The probability of being assigned to a desk in the front row exactly four times over the course of seven days is approximately 0.008, or 0.8%.
There are a total of 16 desks in the classroom, arranged in 4 rows and 4 columns. The probability of being assigned to a desk in the front row is 4/16 = 1/4, since there are 4 desks in the front row.
To calculate the probability of being assigned to a front-row desk exactly 4 times over the course of 7 days, we can use the binomial probability formula:
P(X = k) = (n choose k) * p^k * (1 - p)^(n-k)
where X is the random variable representing the number of times you are assigned to a front-row desk, n is the number of trials (in this case, 7), k is the number of successes (being assigned to a front-row desk), p is the probability of success on each trial (1/4), and (n choose k) represents the number of ways to choose k successes out of n trials, which is given by the binomial coefficient formula:
(n choose k) = n! / (k! * (n-k)!)
where ! represents the factorial function.
Using this formula, we get:
P(X = 4) = (7 choose 4) * (1/4)^4 * (3/4)^3
P(X = 4) = (35) * (1/256) * (27/64)
P(X = 4) ≈ 0.008
Therefore, the probability of being assigned to a desk in the front row exactly four times over the course of seven days is approximately 0.008, or 0.8%.
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Define a useful quantity for our expectation about the amount of a time an
in-control process will remain ostensibly in-control, the average run length (ARL), to be the number of samples that will be observed, on average, before a point falls outside control limits. If p is the probability that any given point falls outside the control limits, then:
ARL = 1/p
(Estimating the true ARL may be useful for detecting an out-of-control process, but not
necessarily doing so quickly.) A process is Gaussian with mean 8 and standard deviation 2. The process is monitored by taking samples of size 4 at regular intervals. The process is declared to be out of control if a point plots outside the 3σ control limits on an X-chart. If the process mean shifts to 9, what is the average number of samples that will be drawn before the shift is detected on an X-chart?
Answer:
First, we need to calculate the control limits for the X-chart. Since the sample size is 4, the standard deviation of the sample mean is:
σ/√n = 2/√4 = 1
The 3σ control limits for the X-chart are:
Upper Control Limit (UCL) = 8 + 3(1) = 11
Lower Control Limit (LCL) = 8 - 3(1) = 5
Next, we need to find the probability that a point falls outside the control limits when the process mean shifts to 9. This can be calculated using the Gaussian distribution:
P(X < 5 or X > 11) = P(Z < (5-9)/2) + P(Z > (11-9)/2) = 0.00135 + 0.00135 = 0.0027
where Z is the standard normal distribution.
Therefore, the average run length (ARL) is:
ARL = 1/p = 1/0.0027 = 370.37
So on average, it will take 370.37 samples before the process mean shift is detected on an X-chart.
Already Know The Vertex but need help on the opens and axis of symmetry
Answer: x = -3
Step-by-step explanation:
Hope this helps.
Determine whether the series 2 + cos(n) n 71.1 is convergent or divergent using the Comparison Test. ow
To use the Comparison Test, we need to find a series that we know is either always greater than or always less than our given series
. Since cosine values oscillate between -1 and 1, we know that 2 + cos(n) is always greater than or equal to 1. Therefore, we can compare our given series to the series 1/n, which we know is a p-series with p = 1 and is divergent.
Using the Comparison Test, we can say that since 1/n is divergent and 1/n ≤ 2 + cos(n) for all n ≥ 71.1, then the series 2 + cos(n) n 71.1 must also be divergent. Therefore, the series 2 + cos(n) n 71.1 is divergent.
Hi! To determine whether the series Σ(2 + cos(n)), where n ranges from 1 to infinity, is convergent or divergent using the Comparison Test, we need to compare it with another series whose convergence behavior is known.
Consider the series Σ(2), which is a constant series where every term is 2. This series diverges, as its partial sums keep increasing without bound. Since cos(n) is bounded between -1 and 1, we know that for every n, 1 ≤ (2 + cos(n)) ≤ 3.
Now, using the Comparison Test, we can compare Σ(2 + cos(n)) with Σ(2). Since Σ(2) is divergent and 2 + cos(n) is always greater than or equal to 2, we can conclude that the series Σ(2 + cos(n)) is also divergent.
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A tray of lasagna comes out of the oven at 200°F and is placed on a table
where the surrounding room temperature is 70°F. The temperature T (in °F) of
the lasagna is given by the function (0) -e(486753-1) +70, 0 s t, where tis time
(in hours) after taking the lasagna out of the oven. What is the rate of change
in the temperature of the lasagna exactly 2 hours after taking it out of the
oven?
Rate of change in the temperature of lasagna given by function T(t) = 70 + (200 - 70) × [tex]e^{(-0.0001t)}[/tex] exactly 2 hours after taking it out of oven is -0.013 °F/hour.
Surrounding room temperature is equal to 70°F
Temperature at which lasagna comes out of the oven = 200°F
The temperature T (in °F) of the lasagna at time t (in hours) after taking it out of the oven is equal to,
T(t) = 70 + (200 - 70) × [tex]e^{(-0.0001t)}[/tex]
To find the rate of change in the temperature of the lasagna exactly 2 hours after taking it out of the oven,
Find the derivative of the temperature function with respect to time t.
T'(t) = -0.013[tex]e^{(-0.0001t)}[/tex]
Substituting t = 2 into this expression gives:
T'(2) = -0.013[tex]e^{(-0.0001\times 2)}[/tex]
= -0.013[tex]e^{-0.0002}[/tex]
= -0.013 × 0.99980
= -0.0129974
= -0.013
Therefore, the rate of change in the temperature of the lasagna exactly 2 hours after taking it out of the oven is approximately -0.013 °F/hour.
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The given question is incomplete, I answer the question in general according to my knowledge:
A tray of lasagna comes out of the oven at 200°F and is placed on a table where the surrounding room temperature is 70°F. The temperature T (in °F) of the lasagna is given by the function T(t) = 70 + (200 - 70) × [tex]e^{(-0.0001t)}[/tex] where t is time(in hours) after taking the lasagna out of the oven. What is the rate of change in the temperature of the lasagna exactly 2 hours after taking it out of the oven?
A 4.0kg box slides with an initial speed of 3.0 m/s, end fraction towards a spring on a frictionless horizontal surface. when the box hits the spring, the spring compressed by 0.30m. what is the spring constant.
The spring constant is 180 N/m.
To solve for the spring constant, we can use the equation: k = (m * g) / x
where k is the spring constant, m is the mass of the box, g is the acceleration due to gravity (9.8 m/s^2), and x is the compression distance of the spring.
First, let's get the final velocity of the box when it hits the spring. We can use the equation:
v^2 = u^2 + 2as
where v is the final velocity (0 m/s), u is the initial speed (3.0 m/s), a is the acceleration (which is constant and equal to -k/m since the force from the spring is in the opposite direction of the box's motion), and s is the compression distance of the spring (0.30 m).
Rearranging the equation, we get:
k/m = (u^2 - v^2) / (2s)
k/4.0 = (3.0^2 - 0^2) / (2 * 0.30)
k/4.0 = 45
k = 180 N/m
Therefore, the spring constant is 180 N/m.
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Gianna keeps track of the number of people inside a music hall to attend a concert by looking at the number of scanned tickets. She plotted the data on the graph below, where x = 0 x=0 represents the time at 6 p.m., then drew a line of best fit. What does the point ( 1 , 92 ) (1,92) represent?
Note that the point ( 1 , 92 ) (1,92) represents the estimated number of people in the hall at 7pm.
How is this so?This is based on the given graph.
Note tha the horizontal axis = x = 0
which corresponds to 6pm
the vertical is the number of scanned tickets.
Also, the pont (1, 92) is the line of best fit so that means that at 7pm which is a n hour after 6pm, there were about 92 persons still in the hall.
Hence we are correct to state that the point ( 1 , 92 ) (1,92) represents the estimated number of people in the hall at 7pm.
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Full Question:
See attached image/graph
(2^-1/2) / (2^1/2)
How to flip negative exponents
The value of the expression is 2
What are index forms?Index forms are described as those forms that are used to represent numbers that are too large or small in more convenient forms.
They are also described as numbers that are raised to a variable or an exponents.
Other names for index forms are scientific notations and standard forms.
One of the rules of index forms is that the exponents are added when the have the same and are being multiplied.
From the information given, we have that;
(2^-1/2) / (2^1/2)
subtract the exponents
2^-1/2-1/2
subtract the values
2^ -1
Then, we have;
2
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Which unique sequence of rigid motions maps quadrilateral abcd to quadrilateral efgh?
s
а
ib
4
d
ll2_3 4 5 6
e
f
h
g
a a reflection over the x-axis followed by a translation of (,y) → (, y - 4).
b. a reflection over the y-axis followed by a translation of (1,y) → (, y-6).
c a translation of (+,y) → (2, y - 3) followed by a reflection over the y-axis.
a translation of (cv) (1-6, y) followed by a reflection over the x-axis.
d.
The correct answer is option B, a reflection over the y-axis followed by a translation of (1,y) → (1, y-6).
To solve this problem, we need to find the sequence of rigid motions (i.e., transformations that preserve distance and angle) that maps quadrilateral ABCD to quadrilateral EFGH.
First, we need to identify the corresponding vertices of the two quadrilaterals. Let's assume that vertex A maps to vertex E, vertex B maps to vertex F, vertex C maps to vertex G, and vertex D maps to vertex H.
Now, we can apply different transformations to map each vertex of quadrilateral ABCD to the corresponding vertex of quadrilateral EFGH. We can try each option provided and check if it maps all the vertices correctly.
Option A involves a reflection over the x-axis, followed by a translation of (0,y) → (0, y - 4). This transformation does not map vertex A to vertex E correctly.
Option B involves a reflection over the y-axis, followed by a translation of (1,y) → (1, y - 6). This transformation maps vertex A to vertex E, vertex B to vertex F, vertex C to vertex G, and vertex D to vertex H, which is the correct mapping.
Option C involves a translation of (+,y) → (2, y - 3) followed by a reflection over the y-axis. This transformation does not map vertex A to vertex E correctly.
Option D involves a translation of (1-6, y) followed by a reflection over the x-axis. This transformation does not map vertex A to vertex E correctly.
Therefore, the unique sequence of rigid motions that maps quadrilateral ABCD to quadrilateral EFGH is a reflection over the y-axis followed by a translation of (1,y) → (1, y-6), which is option B.
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using graphical method to solve simultaneous equation y=2-2x and y=2x-6
The solution to the system of equations is x=2 and y=-2.
To solve the system of simultaneous equations graphically, we need to graph both equations on the same coordinate plane and find their point of intersection.
First, we'll rearrange both equations to be in the form y=mx+b, where m is the slope and b is the y-intercept.
y = 2 - 2x can be rewritten as y = -2x + 2
y = 2x - 6 can be rewritten as y = 2x - 6
Now, we'll plot both equations on the same coordinate plane. To do this, we'll create a table of values for each equation and plot the points.
For y = -2x + 2: (0,2), (1,0), (2,-2)
For y = 2x - 6:(0,-6), (1,-4), (2,-2)
Next, we'll plot these points on the same graph and draw the lines connecting them.
The point where the lines intersect is the solution to the system of equations. From the graph, we can see that the point of intersection is (2,-2).
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Pythagorean theorem help quickly please
Answer:
In an isosceles right triangle, the length of the diagonal is √2 times the length of a leg.
c = 6√2 in. = 8.5 in.
A plumber charges 14.95 to come to the house and 27.50 per hour the plumber sends a 138.70 bill
The plumber worked for 4.5 hours and charged $138.70 for their services
How we find the time plumber work?To find out how many hours the plumber worked, we first need to subtract the initial charge of $14.95 from the total bill of $138.70.
$138.70 - $14.95 = $123.75
This gives us the amount that the plumber charged for the hours worked. Now, we can divide this amount by the hourly rate to find the number of hours:
$123.75 ÷ $27.50 per hour = 4.5 hours
However, we need to convert the decimal part (0.5) into minutes. We can do this by multiplying it by 60:
0.5 x 60 = 30 minutes
But we need to add the initial charge of $14.95 to get the final answer.
4 hours and 30 minutes is equivalent to 4.5 hours.
4.5 hours x $27.50 per hour = $123.75
$123.75 + $14.95 = $138.70
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Last month, lucy and lara sold candy to raise money for their debate team. lara sold 1/5 as much candy as lucy did. if lucy sold 3/5 of a box of candy, how many boxes of candy did lara sell?
Lara sold 3/5 of a box of candy, which is the same as 0.6 boxes of candy.
How many boxes of candy did Lara sell last month to raise money?If Lucy sold 3/5 of a box of candy, then Lara sold 1/5 of 3/5, which is:
(1/5) * (3/5) = 3/25
Therefore, Lara sold 3/25 of a box of candy.
To find the number of boxes Lara sold, we can divide 3/25 by 1/5:
(3/25) ÷ (1/5) = (3/25) * (5/1) = 15/25 = 3/5
So Lara sold 3/5 of a box of candy, which is the same as 0.6 boxes of candy.
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Line segment RS is shown below with coordinates R(-8, -3)
and S(3, -3). Which coordinate below would represent R' if
point R was reflected across the x-axis?
A. (-8, 3)
B. (3, 3)
C. (8, -3)
D. (-3,-3)
10 9 8 7 6 5 4 3 2 1 1
R
2
4
-5
-6
10
•S.
S
Answer:
If point R is reflected across the x-axis, its y-coordinate will change sign. Therefore, the y-coordinate of R' will be 3 (the opposite of -3). Thus, the answer is A. (-8, 3)
Step-by-step explanation:
what inequality does the graph represent
Answer:
(c) y < -x +1
Step-by-step explanation:
You want the inequality that matches the graph.
Boundary lineThe boundary line of the shaded area has a negative slope: it falls one unit for each unit to the right, so the slope is ...
m = rise/run = -1/1 = -1
The line crosses the y-axis at y = 1, so the y-intercept is b = 1.
The equation of the boundary line is ...
y = mx + b
y = -x +1
ShadingThe boundary line is dashed, so its values are not part of the solution set. The shading is below the line, so only y-values less than those on the line are included.
The inequality is ...
y < -x +1 . . . . . choice C
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A paper bag has five colored marbles. The marbles are red, green, blue, yellow, and orange. List the sample space when choosing one marble.
S = {1, 2, 3, 4, 5}
S = {red, blue, green, yellow}
S = {g, r, b, y, o}
S = {green, blue, yellow, orange}
The sample space for choosing one marble from the given marbles which are red, green, blue, yellow, and orange is s = {red, green, blue, yellow, orange}
Given color of the marbles which are present in the paper bag are,
red greenblueyelloworangeThe five color marbles are present in the paper bag so, the sample space also contains all five marbles without repeating any color again.
Sample space: sample space is nothing but listing all the outcomes of the event. In the above event, we have to list the all outcomes when choosing one marble from the paper bag which containing five different marbles.
So, the sample space S = {red, green, blue, yellow, orange}
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From 9 names on a ballot, a committee of 5 will be elected to attend a political national convention. How many different committees are possible? Use the empirical probability formula to solve the exercise
The number of different committees that are possible is: 126
How to solve Permutation and Combination?When you have a number of elements and then want to form subsets of elements of particular smaller size, you can utilize combinations or permutations. If the order of placement of the elements does not matter, we use combinations to quantify the number of groups formed.
Now, the order of the members in the committee does not matter and as such we will use combinations which has the formula:
nCr = n!/(r!(n - r)!)
We are given:
n = 9
r = 5
Thus:
9C5 = 9!/(5!(9 - 5)!)
= 126 different committees
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1. Direct or indirect characterization? "Nina was so annoyed at her little brother for bothering her. " Direct Indirect 2. Direct or indirect characterization? "Tim's room was a mountain of dirty clothes and used dishes that had been piled up for weeks. " Direct Indirect 3. An author can show indirect characterization through a character's thoughts, feelings, actions, and the setting of the story. Their effect on others. The rising action. Do all 3
An author can show indirect characterization through a character's thoughts, feelings, actions, and the setting of the story, as well as through their effect on others and their role in the rising action of the plot.
All of these elements can provide insights into a character's personality, motivations, and values, without the author explicitly stating them.
By carefully observing the character's interactions with others, their reactions to events, and the situations in which they find themselves, readers can draw conclusions about who the character is and what drives them.
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The number of coyotes found in certain state counties is decreasing at a rate of 4. 5% per year. A wildlife biologist recently counted 100 coyotes in one tri-county area. The biologist uses a function to model the population over time and then uses this model to predict the coyote population. Which function model did the biologist correctly use to predict when the population would be fewer than 50 in this tri-county area?
The biologist predicts that the population would be fewer than 50 in approximately 30 years from the initial count.
The biologist likely used the exponential decay function to model the coyote population over time. This function takes the form:
P(t) = P0 * (1 - r)^t
Where:
P(t) is the population at time t,
P0 is the initial population (100 coyotes),
r is the rate of decrease (0.045 or 4.5%),
t is the time in years.
To predict when the population would be fewer than 50, the biologist would solve the equation:
50 = 100 * (1 - 0.045)^t
t = 30
This equation can be used to find the value of t, which represents the number of years it takes for the population to decrease to fewer than 50 coyotes in the tri-county area, which is 30 years.
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Chord eg measures 8 inches and the distance from the center of j to the chord is 3 inches
The length of chord segment EG = 6 inches and the length of FG = √23 inches.
Given, chord EG = 8 inches and the distance from the center of J to the chord is 3 inches.
We can draw a diagram as follows:
J
/ \
/ \
/ \
/ \
E-----------G
|
|
|
|
|
F
Here, OJ is perpendicular to chord EG at point F.
As per the theorem, the length of the perpendicular from the center of the circle to a chord is half the length of the diameter intersecting the chord.
So, we can find the length of the diameter intersecting chord EG and then use it to find the radius of the circle.
Length of chord EG = 8 inches
Length of OJ = 3 inches
Using Pythagorean theorem in right triangle OFG, we get:
OG² = OF² + FG²
Let x be the length of FG
We know that OF = OJ = 3 inches
OG = radius of the circle
So, we have:
radius of circle = OG = √(OF² + FG²) = √(3² + x²)
The diameter of the circle = 2(radius) = 2√(3² + x²)
Now, using the theorem mentioned above, we can say:
Length of perpendicular from the center of the circle to chord EG = OF = 3 inches
Length of diameter intersecting chord EG = 2√(3² + x²)
So, we get:
Length of chord segment EG = 2 * length of perpendicular
= 2 * 3 inches
= 6 inches
Now, we know that the chord segment EG divides the diameter intersecting it into two equal parts.
So, we have:
Length of one part of the diameter = (2√(3² + x²))/2 = √(3² + x²)
Using Pythagorean theorem in right triangle OJF, we get:
OJ² + JF² = OF²
3² + JF² = 8²
JF² = 8² - 3² = 55
JF = √55
Using Pythagorean theorem in right triangle JFG, we get:
JG² + FG² = JF²
(√(3² + x²))² + x² = 55
9 + x² + x² = 55
2x² = 46
x² = 23
x = √23
Therefore, the length of chord segment EG = 6 inches and the length of FG = √23 inches.
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Can you find the domain and range and type the correct code? help me please.
The graphs are identified as follows
1. the domain is option G
2. the range is option E
3. the domain is option D
4. the range is option C
What is domain and range in coordinate geometryIn coordinate geometry, the domain and range are concepts used to describe the set of possible inputs (x-values) and outputs (y-values) of a function, respectively.
The domain of a function is the set of all possible x-values for which the function is defined. In other words, it is the set of all values that can be plugged into the function and produce a meaningful output.
The range of a function is the set of all possible y-values that the function can take on as x varies over its domain. In other words, it is the set of all values that the function can output.
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Which linear equation represents a relation that is NOT a function? y = 3x +6 y = 9 −4y + 5x = 20 x = 7
Answer:
x = 7 is not a function--it is a vertical line.
A random sample of 155 observations results in 62 successes. [You may find it useful to reference the z table.]a. Construct the a 90% confidence interval for the population proportion of successes. (Round intermediate calculations to at least 4 decimal places. Round "z" value and final answers to 3 decimal places.)b. Construct the a 90% confidence interval for the population proportion of failures. (Round intermediate calculations to at least 4 decimal places. Round "z" value and final answers to 3 decimal places.)
For a random sample of 155 observations results in 62 successes.
a) A 90% confidence interval for the population proportion of successes is equals to the (0.335 , 0.465).
b) A 90% confidence interval for the population proportion of failure is equals to the (0.535 , 0.665).
We have a random sample of 155 observations results in 62 successes. So,
Observed value, x = 62
Sample size,n = 155
Population Proportion, p = x/n
= 62/155
= 0.4
a) We have to determine 90% confidence interval for the population proportion of successes. Using the distribution table, for 90% confidence interval, z-score value is equals to 1.6. Consider Confidence interval formula with proportion, CI [tex]= p ± z×\sqrt\frac{p(1-p)}{n}[/tex]
substitute all known values in above formula, [tex]= 0.4 ± 1.64\sqrt\frac{0.4(1- 0.4)}{155}[/tex]
= 0.4 ± 0.0645
= (0.4 - 0.0645 , 0.4 + 0.0645)
= (0.335 , 0.465)
b) Now, we have to determine a 90% confidence interval for the population proportion of failures.
Now consider, here failure observed values, x = 155 - 62
= 93
proportion, p = x/n
= 93/155 = 0.6
Consider the confidence interval formula, CI [tex]= p ± z×\sqrt\frac{p(1-p)}{n}[/tex]
substitute values, [tex]= 0.6 ±1.64×\sqrt\frac{0.6(1-0.6)}{155}[/tex]
= 0.6 ± 0.0645
= (0.6 - 0.0645 , 0.6 + 0.0645)
= (0.535 , 0.665)
Hence, required value is (0.535 , 0.665).
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i need to know the full quadratic equation answer
Required Answer :
x(2x + 4)= x²+ 4 (9 - 3x)
2x² + 4x = x² + 36 - 12x
2x² - x² + 4x + 12x - 36=0
x² + 16x - 36=0
Quadratic equation in Standard form,
a = 1, b = 16c = -36Using Quadratic formula,
[tex] \implies \sf x = \dfrac{ - b \pm \sqrt{ {b}^{2} - 4ac} }{2a} \\ \\ \implies \sf x = \dfrac{ - 16 \pm \sqrt{ {16}^{2} - 4(1)( - 36)} }{2 \times 1} \\ \\ \implies \sf x = \dfrac{ - 16\pm \sqrt{256 - ( - 144)} }{2} \\ \\ \implies \sf x = \frac{ - 16 \pm \sqrt{256 + 144} }{2} \\ \\ \implies \sf x = \frac{ - 16 \pm \sqrt{400} }{2} \\ \\ \implies \sf x = \dfrac{ - 16 \pm20}{2} \\ \\ \implies \sf x = \dfrac{ - 16 \pm 20}{2} \\ \\ \implies \sf x = \dfrac{4}{2} \: or \: \dfrac{ - 36}{2} \\ \\ \implies \sf x = 2 \: or \: - 18[/tex]
Help on problem 2 and 3!
(I already did 1. Stepby step please ASAP!)
The missing angles ;
22.6°
53.1°
28.1°
Right triangleA right triangle is a type of triangle that has one of its angles measuring 90 degrees (a right angle). The side opposite to the right angle is called the hypotenuse, and the other two sides are called legs or catheti.
We have that;
[tex]Sin \alpha = 5/13\\ \alpha = Sin-1(5/13)\\ \alpha = 22.6[/tex]
[tex]Tan \alpha = 16/12\\\alpha = Tan-1 (16/12)\\= 53.1[/tex]
[tex]Sin \alpha = 8/17\\\alpha = Sin-1(8/17)\\\alpha = 28.1[/tex]
Right triangles have many practical applications, such as in trigonometry, engineering, and architecture.
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21. if you have the raw scores of two individuals on a norm-referenced test, which of the following is important in terms of making meaning of those scores? a. measures of central tendency (mean, median, mode) b. the relative positions of the scores to the rest of the group c. whether higher scores are better than lower scores d. how an individual feels about his or her score e. all of these are important.\
The term which is important in terms of making meaning of those scores is measures of central tendency (mean, median, mode), option A.
A single number that seeks to characterise a set of data by pinpointing the centre location within that set of data is referred to as a measure of central tendency. As a result, measurements of central location are occasionally used to refer to measures of central tendency.
These also fit within the category of summary statistics. You are probably most familiar with the mean (sometimes known as the average), but there are additional central tendency measures, including the median and the mode.
The mean, median, and mode are all reliable indicators of central tendency, however depending on the situation, certain indicators are more useful than others.
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Can you guess how many quarters TJ and Demi have in their pockets? And one Demi has nine more quarters than tj. And two if you double the number of quarters TJ has and triple the number of quarters then he has you would get 112 quarters in total. How many quarters does TJ have?
Answer: TJ has 17 quarters and Demi has 26 quarters.
Step-by-step explanation:
Let t be the number of quarters TJ has and d be the number of quarters Demi has.
First, we will write an equation based on the first detail given:
d = t + 9
Next, we will write an equation based on the second detail given:
2t + 3d = 112
Now, we will substitute the first equation into the second and solve for t.
2t + 3d = 112
2t + 3(t + 9) = 112
2t + 3t + 27 = 112
5t + 27 = 112
5t = 85
t = 17 quarters
Lastly, we know that Demi has 9 more quarters than TJ. We will add 9.
17 quarters + 9 quarters = 26 quarters
Answer:
TJ has 17 quarters.
Step-by-step explanation:
Let d and t equal the numbers of quarters Demi and TJ have, respectively.
"Demi has nine more quarters than TJ."
d = t + 9
"if you double the number of quarters TJ has and triple the number of quarters then he has you would get 112 quarters in total"
I think that "then he" above really should read "Demi."
2t + 3d = 112
d = t + 9
2t + 3d = 112
2t + 3(t + 9) = 112
2t + 3t + 27 = 112
5t = 85
t = 17
Answer: TJ has 17 quarters.
X varies jointly as y and z.
Write an equation that express each relationship. Then solve the equation for y.
An equation that express each relationship for the joint variation is X = kyz. Solving for y will give the equation y = X/(kz)
What is joint variationJoint variation is a mathematical concept that describes the relationship between two or more variables.
If X varies jointly as y and z, we can express this relationship mathematically using the formula:
X = k × y × z
X = kyz
where k is a constant of proportionality.
We can solve for y by dividing both sides by kz follows:
X/kz = kyz/kz
X/(kz) = y
Therefore, the equation that express each relationship for the joint variation is X = kyz. And the equation solved for y is y = X/(kz).
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Point B is the image of point A when point A is rotated about the origin. What is known about point A and B?
Point B is the image of point A under a rotation about the origin.
Describe Rotation?Rotation is a transformation in which an object or a point is turned around a fixed point or a fixed axis. The fixed point or axis is called the center of rotation, and the angle of rotation specifies the amount and direction of the turn. When an object is rotated, its orientation changes but its shape and size remain the same.
For example, if you rotate a square by 90 degrees around its center, it will look the same as before, but it will be oriented differently. Similarly, if you rotate a point in a coordinate system around the origin, its position will change, but its distance from the origin will remain the same.
Rotations are commonly used in geometry, physics, and engineering to describe the motion of objects, such as the rotation of the Earth around its axis or the rotation of a wheel on an axle. They are also used in computer graphics to create animations and in robotics to control the movement of robotic arms and other devices.
When point A is rotated about the origin to form point B, the distance between the origin and each point remains the same. The direction from the origin to point A and the direction from the origin to point B are related by the angle of rotation. Specifically, point B is the image of point A under a rotation about the origin.
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V=-x2+14x -24 I need to find the range domain and graph?
please help me with this Pythagoras theorum
Step-by-step explanation:
18 m = hypotenuse = c
5 m = b
a² + b² = c²
a² + (5)² = (18)²
a² + 25 = 324
a² = 324 - 25
a² = 299
a = √299
a = 17.29 or 17.3 m
perimeter = a + b + c
= 17.3 + 18 + 5
= 40.3 m
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