Answer:
Step-by-step explanation:
The standard form equation for an ellipse with center at the origin is:
x^2/a^2 + y^2/b^2 = 1
where 'a' is the distance from the center to the vertices along the x-axis and 'b' is the distance from the center to the vertices along the y-axis.
In this case, the center is at the origin, and a vertex is at (3, 0). So, we know that 'a' = 3.
We also know that the distance from the center to the focus is 'c', and that:
c^2 = a^2 - b^2
Since the center is at the origin, 'c' is the distance from the focus (1, 0) to the origin, which is 1. So, we can solve for 'b' as:
c^2 = a^2 - b^2
1^2 = 3^2 - b^2
b^2 = 3^2 - 1^2
b^2 = 8
b = sqrt(8) = 2sqrt(2)
Substituting these values into the standard form equation, we get:
x^2/3^2 + y^2/(2sqrt(2))^2 = 1
Simplifying:
x^2/9 + y^2/8 = 1
So, the equation in standard form for the given ellipse is:
9x^2 + 8y^2 = 72
Bentley invested $670 in an account paying an interest rate of 6 7/8% compounded
quarterly. Camden invested $670 in an account paying an interest rate of 7 3/8%
compounded annually. To the nearest hundredth of a year, how much longer would
it take for Bentley's money to triple than for Camden's money to triple?
It will take 15.03 years for Bentley's money to triple.
How longer for Bentley's money to triple than Camden's?For Bentley:
We have
Principal (P) = $670
Interest rate (r) = 6 7/8% = 0.06875 (compounded quarterly)
Time (t) = unknown
Amount after t years (A) = [tex]P(1 + r/4)^{4t}[/tex]
For Camden:
We have
Principal (P) = $670
Interest rate (r) = 7 3/8% = 0.07375 (compounded annually)
Time (t) = unknown
Amount after t years (A) = [tex]P(1 + r)^t[/tex]
We have to find t such that 3P_Bentley = Camden.
[tex]2010 = 2010(1 + r/4)^{4t} / (1 + r)^t[/tex]
Simplifying, we get:
[tex](1 + r/4)^{4t} / (1 + r)^t = 1/3[/tex]
Taking natural logarithm:
4t ln(1 + r/4) - t ln(1 + r) = ln(1/3)
4 ln(1 + r/4) - ln(1 + r) = ln(1/3) / t
t = (4 ln(3.88356) - 4 ln(16)) / ln(3)
Solving for t, we get:
t = 15.034752564
t = 15.03 years.
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2raised to power m-3 = 1
Answer:
m = 3
Step-by-step explanation:
Given:
[tex]2^{m-3}[/tex] = 1
Take the logarithm of both sides (logarithm of 1 is 0):
m - 3 = 0
Add 3 to both sides:
m - 3 + 3 = 0 + 3
m = 3
Hence, m = 3.
Logarithm is the power to which a number must be raised in order to get some other number. For example:
The base ten logarithm of 100 is 2, because ten raised to the power of two is 100: log 100 = 2. Meaning [tex]10^{2}[/tex] = 100.A landscaper worded 8-1/2 hours on Monday, 3-1/3 hours on Tuesday and 6-1/4 hours on Wednesday. How many total hours did she work?
If landscaper worked 8-1/2 hours on Monday, 3-1/3 hours on Tuesday and 6-1/4 hours on Wednesday then total of 18.08 hours worked.
To find the total number of hours worked, we need to add up the hours worked on each day.
On Monday, the landscaper worked for 8-1/2 hours, which is the same as 8.5 hours.
On Tuesday, the landscaper worked for 3-1/3 hours, which is the same as 3.33 hours
On Wednesday, the landscaper worked for 6-1/4 hours, which is the same as 6.25 hours.
To find the total hours worked, we add the hours worked on each day:
Total hours worked = 8.5 + 3.33 + 6.25
Total hours worked = 18.08
Therefore, the landscaper worked a total of 18.08 hours.
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The probability that Rosie goes to the beach after school is 6 11 If she does go to the beach, then the probability that she does her homework is ) If she does not go to the beach, then the probability that she does her homework is 3 4 Work out the probability that Rosie does her homework. Give your answer as a fraction in its simplest form.
The probability that Rosie does her homework is: 27/44
How to find the conditional probability?Conditional probability is defined as the likelihood of an event or outcome occurring, based on the occurrence of a previous event or outcome. Conditional probability is calculated by multiplying the probability of the preceding event by the updated probability of the succeeding, or conditional, event.
Thus, we can solve this probability as:
(6/11 * 1/2) + ((1 - (6/11) * 3/4)
= (3/11) + (5/11 * 3/4)
= (3/11) + 15/44
= 27/44
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evaluate the expression
After substituting the values as x=3 and y=7, the value of the expression "2x²-y¹+3x⁰" is 14.
In mathematics, an expression is a combination of numbers, variables, and mathematical operations (such as addition, subtraction, multiplication, and division) that can be simplified or evaluated to a numerical value.
To evaluate the expression 2x²-y¹+3x⁰ for x=3 and y=7, we substitute the given values, which are x=3 and y=7 into the expression and simplify:
On substituting the values,
We get,
= 2x² - y¹ + 3x⁰
= 2(3)² - 7¹ + 3(1)
= 2(9) - 7 + 3
= 18 - 7 + 3
= 14
Therefore, when x=3 and y=7, the value of the expression 2x²-y¹+3x⁰ is 14.
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A typewriter says that he can write 50 pages under 60 minutes. You selected 24 cases for these 50 pages, and found that it takes 63.2 (in minutes) and its standard deviation is 7.7 (in minutes). The test statistic for this test is equal to
a.
t = 2.04
b.
Z = 1.79
c.
t = 1.79
d.
t = 2.04
Answer: To determine the correct answer, we need to calculate the t-test statistic using the given information.
The formula for the t-test statistic for a one-sample t-test is:
t = (x - μ) / (s / sqrt(n))
where x is the sample mean, μ is the hypothesized population mean (which is not given in this question), s is the sample standard deviation, and n is the sample size.
Here, x = 63.2 minutes, s = 7.7 minutes, and n = 24 cases. We are not given a hypothesized population mean, so we cannot calculate the exact t-test statistic. However, we can use the sample mean as an estimate of the population mean for the purposes of this question.
Plugging in the values, we get:
t = (63.2 - 60) / (7.7 / sqrt(24))
t = 2.04
Therefore, the correct answer is (a) t = 2.04.
The point (3,b) lies on the circle with radius 8 and center (−2,−1). What are the possible values of b
The point (3,b) can lie on the circle with radius 8 and center (-2,-1) for values of b equal to -1 + √39 and -1 - √39.
We know that the circle with radius 8 and center (-2,-1) has the equation:
(x + 2)² + (y + 1)² = 8²
Substituting x = 3 and y = b, we get:
(3 + 2)² + (b + 1)² = 8²
Simplifying, we get:
25 + (b + 1)² = 64
(b + 1)² = 39
Taking the square root of both sides, we get:
b + 1 = ± √39
Therefore, the possible values of b are:
b = -1 ± √39
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5. Un tanque contiene 9 litros de agua si se abre el grifo que vierte tres litros de agua por minuto y y es la cantidad de agua (en litros), que hay en el tanque después de x minutos
The equation that models the amount of water in the tank after x minutes is:
y = -3x + 9
How many liters are there after x minutes?We know that the tank contains 9 liters of water, and it loses water at a constant rate of 3 liters per minute.
Then we can model the amount of water y in the tank after x minutes with a linear equation where the y-intercept is 9 and the rate of change is -3 (the amount it loses per unit of x)
Then the equation is:
y = -3x + 9
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Match the line described on the left with the slope of the line on the right.
x=-3 , 6x-3y=18 , the line through (7,5) and (8,5) , the line through (4,-2) and (1,7)
Undefined -3 , 0 , 2
The Slope of x = -3 is undefined; 6x-3y=18 is 2; (4,-2) and (1,7) is -3; and (7,5) and (8,5) is 0.
What is the Slope of a Line?Slope of a line (m) = rise/run = change in y / change in x
Note that the slope of vertical lines are always undefined.
Therefore, we have the following:
x = -3 represents the equation of a vertical line, therefore, the slope is undefined.
6x - 3y = 18 is rewritten as y = 2x - 6 in slope-intercept form. The slope is 2.
For (4,-2) and (1,7):
Slope (m) = (7 -(-2))/(1 - 4) = 9/-3 = -3
For (7,5) and (8,5):
Slope (m) = 5 - 5/8 - 7 = 0/1 = 0
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a couple decides to keep having children until they have a girl, at which point they will stop having children. they also agree to having a maximum of 3 children. the table shows the probability distribution of X=the number of children such a couple would have.
From the discrete distribution given, the standard deviation is of 0.83 children.
How to solveThe distribution is:
P(X=1) =0.5
P(X=2) =0.25
P(X=3) =0.25
The mean is 1.75.
The standard deviation is the square root of the sum of the difference squared between each value and the mean, multiplied by it's respective probability.
Hence:
The standard deviation is 0.83 children.
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Hurry I’m running out of time helpppppp
Trey's company makes solid balls out of scrap metal for various industrial uses. For one project, he must make aluminum balls that have a radius of 7.5 in. If
aluminum costs $0.12 per in, how much will the aluminum cost to make one ball?
Use 3.14 for x, and do not round your answer.
Thus, Cost of making 1 solid aluminium ball is found as $211.95.
Explain about the spherical shape:Something spherical is similar to a sphere in three dimensions in that it is round, or somewhat round. Even though they are never exactly round, oranges and apples are both spherical. Since an asteroid is frequently spheroidal—nearly round but lumpy—it has an approximately spherical form.
radius of solid aluminium balls r = 7.5 in.
Cost of of aluminium = $0.12 per cu. in.
Volume of sphere = 4/3 * π * r³
Volume of sphere = 4/3 * 3.14 * 7.5³
Volume of sphere = 1766.25 cu. in.
Cost of making 1 solid aluminium ball = 0.12 * 1766.25
Cost of making 1 solid aluminium ball = $211.95.
Thus, Cost of making 1 solid aluminium ball is found as $211.95.
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Students in a math class recorded the number of text messages they received the previous day. How many students received at least 10 messages? Number of text messages line plot from 0 to 25 by fives. 5 has 2 marks, 10 has 3 marks, 15 has 2 marks, 20 has 4 marks, and 25 has 5 marks. 14 students 11 students 3 students 2 students
Answer:
Step-by-step explanation:
same goes 4 him i though he loved me but 10 =5x2
Please need answer 17.
Answer:
sec(θ) = √10/3tan(θ) = 1/3Step-by-step explanation:
You want the tangent and secant of the angle θ the line x-3y=0 makes with the negative x-axis.
Trig functionsThe relations between the angle and its trig functions are ...
Tan = Opposite/Adjacent
Sec = Hypotenuse/Adjacent
Unit circleWe have shown the angle of interest in a unit circle with the "adjacent" side equal to the radius of the circle (1). Then the values of interest are ...
tan(θ) = opposite side = 1/3 . . . . . . . equal to the slope of the line
sec(θ) = hypotenuse = √(1 +(1/3)²) = √(10/9) = (√10)/3
The tangent is 1/3; the secant is (√10)/3.
__
Additional comment
A third-quadrant angle measured from the +x axis has a negative secant. The tangent is positive there.
Since this angle is measured from the -x axis, it isn't clear whether it is supposed to be considered a 3rd-quadrant angle or not. For the given acute angle θ shown, the trig functions are both positive. YMMV
Sonji went to a sandwich shop for lunch with 8 of her friends. Part of the group ordered only a sandwich for $5, and the
rest of the group ordered à combo for $8. The bill for all 9 people totaled $66.00. Which system of equations represents
the number of meals of each type that Sonji and her friends purchased?
Answer:
x+y=9
5x+8y=66
Step-by-step explanation:
What is the absolute value of 1/8 
Answer:
1/8
Step-by-step explanation:
The absolute value of positive numbers (decimals, fractions, etc.) is the same number. The absolute value of negative numbers (decimals, fractions, etc.) is the same, but positive.
What is Absolute value?
Absolute value is a set of lines that if any number is placed in it, the number would be positive
Absolute signs: | |
Examples:
|-6|= 6 (Absolute value of -6 is 6)
|9|=9 (Absolute value of 9 is 9) (Because 9 is already positive)
Your Question
Since 1/8 is already positive, the absolute value of it would just be 1/8
Please feel free to ask questions
71
Linda organized one of her desk drawers as shown below.
Paper
Pens
Pens
Pens
She put paper in of her drawer and pens in of the drawer.
Part A: Write and solve an expression to represent the fraction of
her drawer that has paper and pens in it.
The solution is, that the answer to your question would be that the subject(s) of the sentence is/are the following one/s: Tablet, pens. That is, the correct option would be B.
In this sentence, the PP indicating the location of the tablet of paper and the pens appears in initial position in the sentence.
The sentence sounds odd and is not grammatically correct because in these cases an existential there is introduced.
Take a,
a) In the desk drawer, there are a tablet of paper and some pens
b) *In the desk drawer, are a tablet of paper and some pens
The NP "a tablet of paper and some pens" would function as the subject complement and the existential there acts as grammatical subject filler(a).
Hence, The solution is, that the answer to your question would be that the subject(s) of the sentence is/are the following one/s: Tablet, pens. That is, the correct option would be B.
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Write the parametric equations.
x=5t−1,y=1−3t
as a function of x in Cartesian form.
y=
Is AB perpendicular to CD? Explain? pls yall fwm on the answer
Answer: No
Step-by-step explanation: They are not perpendicular due to the slopes. Perpendicular will have the same slopes value wise, but one is negative and one positive.
how many times greater is 4x10^2 than 10^4
Answer:
well 10^4 is 10000, and 4x10^2 is 1600 and if we divide 10000 by 1600 we can find out how many times greater 10000 is than 1600, and the anwser is 6.25
Step-by-step explanation:
what is the answer? compute the following integral.
The integral for this problem has the result given as follows:
[tex]\int_2^5 -8f(x) dx = 168[/tex]
How to solve the integral?The integral over the largest region for this problem is given as follows:
[tex]\int_2^9 f(x) dx = -14[/tex]
The integral can be divided into two smaller regions, as follows:
[tex]\int_2^9 f(x) dx = \int_2^5 f(x) dx + \int_5^9 f(x) dx[/tex]
Hence the integral from x = 5 to x = 9 is given as follows:
[tex]-14 = \int_2^5 f(x) dx + 7[/tex]
[tex]\int_2^5 f(x) dx = -21[/tex]
Multiplying -21 by -8, the result of the integral is given as follows:
[tex]\int_2^5 -8f(x) dx = 168[/tex]
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Someone help I have no idea how to do this, it would help if I could get a step by step
Answer: x=3
Step-by-step explanation:
shaded part is 5/6 of the full circle, so just make an equation.
5/6 pi r^2(formula to find area)=15/2 pi(area given)
cancel out pi and simplify
r^2=9
r=+-3 but cant be negative so r=3
Suppose that the local government of Corpus Christi decides to institute a tax on soda consumers. Before the tax, 30 million liters of soda were sold every month at a price of $11 per liter. After the tax, 25 million liters of soda are sold every month; consumers pay $14 per liter (including the tax), and producers receive $6 per liter.
The amount of the tax on a liter of soda isper liter. Of this amount, the burden that falls on consumers isper liter, and the burden that falls on producers isper liter.
True or False: The effect of the tax on the quantity sold would have been larger if the tax had been levied on producers.
True
False
False. The effect of the tax on the quantity sold would not have been larger if the tax had been levied on producers.
What is Algebraic expression ?
An algebraic expression is a combination of variables, constants, and mathematical operations such as addition, subtraction, multiplication, and division. It may contain one or more terms, with each term separated by a plus or minus sign. Algebraic expressions are used in algebra to represent mathematical relationships and formulas.
The tax incidence (the division of the burden of a tax between buyers and sellers) does not depend on which side of the market the tax is levied on, but rather on the relative elasticities of supply and demand. In this case, we don't have information about the elasticities of supply and demand, so we cannot determine the tax incidence. However, we can infer that the tax on consumers did reduce the quantity sold (from 30 million liters to 25 million liters), so it's unlikely that a tax on producers would have had a larger effect.
Therefore, False. The effect of the tax on the quantity sold would not have been larger if the tax had been levied on producers.
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Select all the correct answers.
If the measure of angle 0 is 2n/3, which statements are true?
The statements that are true are ;
1. tan(tetha) = -√3
2. the measure of the reference angle is 60°
What is trigonometric function?The trigonometric functions are real functions which relate an angle of a right-angled triangle to ratios of two side lengths.
The value of each angle depends on the quadrant it falls on.
First quadrant = 0-90°
second quadrant = 91° -180°
third quadrant = 181-270°
fourth quadrant = 271° - 360°
pi is measurement of angle in radians which is equivalent to 180°
therefore;
2π/3 = 2 × 180/3 = 360/3
= 120°
120 falls on the second quadrant,
tan60 = √3
tan 120 = -√3
the reference angle is 60° i.e
180-120 = 60°
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HELP ASAP PLEASE 20 POINTS!!
The calculated value of the surface area of the cylinder is 138π square inches
Calculating the surface area of the cylinderFrom the question, we have the following parameters that can be used in our computation:
Height, h = 5 1/2 inches
Diameter, d = 12 inches
Using the above as a guide, we have the following:
SA = 2πr(r + h)
Where
Radius, r = d/2
r = 12/2
r = 6
Substitute the known values in the above equation, so, we have the following representation
SA = 2 * π * 6(6 + 5 1/2)
Evaluate
SA = 138π
Hence, the surface area of the cylinder is 138π square inches
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In the coordinate plane, the point X (-1, 0) is translated to the point X' (3, 1). Under the same translation, the points Y (2, 3) and Z (1, -2) are translated to Y' and Z', respectively. What are the coordinates of Y' and Z'?
The coordinates of Y' are (6, 4) and the coordinates of Z' are (5, -1).
To find the coordinates of Y' and Z', we need to apply the same translation that maps X to X'.
We know that the vector that connects X to X' is (3 - (-1), 1 - 0) = (4, 1).
So, to translate Y to Y', we add the vector (4, 1) to the coordinates of Y:
Y' = Y + (4, 1)
= (2, 3) + (4, 1)
= (6, 4)
Similarly, to translate Z to Z', we add the vector (4, 1) to the coordinates of Z:
Z' = Z + (4, 1)
= (1, -2) + (4, 1)
= (5, -1)
Therefore, the coordinates of Y' are (6, 4) and the coordinates of Z' are (5, -1).
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Virginia earns $69,500 per year at her job as a speech pathologist, and she is paid every two weeks. Her most recent paycheck included the following deductions: FICA $200.20 Federal income tax $180.65 State income tax $72.00 Health insurance $110.00 Retirement savings $250.00 Considering her deductions, what percentage of her gross pay did Virginia take home? 71.65% 62.34% 69.59% 68.55%
She takes 69.5% as gross pay at take home,
Hence option (c) is correct.
Given that,
The amount of earning = $69500
From the given table total deduction = 812.85
Since she pay deductions in every two weeks
Therefore,
The gross earning per year = 69500 - 812.85
= $ 48388
There are 365 days in a year
So earing per day = 69500/365 = 4190.411
So gross earing per day = 48388 /365 = 132.569
SO the gross percentage = (132.5/190.5)x100
= 69.5 %
Hence the required percentage is 69.5%
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A boy has 30 spellings to learn.
12 words included an 5, 16 a T and 18 an E.
10 words had an E and a T, 6 words had an Sand aT and 5 words had an E and an S.
4 words had all three.
Probability that?
A • the first two spellings in the test both included only one of the three letters?
C• the first two spellings in the test both had an E and at least one other letter
Answer:
A
Step-by-step explanation:
What are the roots of the quadratic equation below?
2x² + 8x+7= 0
O A. x = = 2√2
1
O B. x =
-8+√120
8
O
O D. x =
C. x = = 4+√/²
-2+√120
Answer:
Step-by-step explanation:
c
Please help with this one as well,,,
The whisker plot with the data provided should includes a range that goes from 7 to 49, and a median of 23.
How to draw a whisker plot?A whisker plot, also known as a box plot, is a graphical representation of a data set that shows the distribution of the data along with some important statistical information, such as the median, quartiles, and outliers. It is particularly useful for comparing the distribution of different data sets or for identifying potential outliers in a data set.
To create a whisker plot, follow these steps:
Collect the data you want to represent and arrange it in order from smallest to largest.Find the median, which is the middle value of the data set. If the data set has an even number of values, the median is the average of the two middle values.Find the lower quartile (Q1), which is the median of the lower half of the data set.Find the upper quartile (Q3), which is the median of the upper half of the data set.Calculate the interquartile range (IQR), which is the difference between Q3 and Q1.Learn more about whisker plots in https://brainly.com/question/2742784
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Solve for x, in terms of y: 23 x + 15 y = 2
MAKE BRAINLYST AND 100
To solve for x in terms of y in the equation 23x + 15y = 2, we can start by isolating the term with x on one side of the equation. We can do this by subtracting 15y from both sides of the equation to get 23x + 15y - 15y = 2 - 15y, which simplifies to 23x = 2 - 15y.
Next, we can solve for x by dividing both sides of the equation by 23 to get 23x/23 = (2 - 15y)/23, which simplifies to x = (2 - 15y)/23.
Therefore, the solution for x in terms of y is x = (2 - 15y)/23.
