Answer:
Step-by-step explanation:
[tex]\sqrt[3]{x^{2} }[/tex] written as a radical expression
The radical is the symbol that is used to represent the root in the expression n√x. The index in the given expression x^(2/3) when rewritten as a radical expression is 3.
What is a radical?The radical is the symbol that is used to represent the root in the expression n√x.
Given the expression [tex]x^{\frac23}[/tex], which can be rewritten in the form of radical as,
[tex]x^{\frac23}\\\\[/tex]
[tex]= x^{2 \times \frac13}\\\\[/tex]
Using the law of exponent, [tex]a^{\frac1x} = \sqrt[x]{a}[/tex], then we can write,
[tex]= \sqrt[3]{x^2}[/tex]
Now, in the given expression 3 is an index, x² is the radicand and the symbol √ is known as the radical.
Hence, the index in the given expression x^(2/3) when rewritten as a radical expression is 3.
Learn more about the Radical here:
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need!!!!!!!!!!!help!!!!!!Asap!!!!!!
Answer:
225 feet below sea level (or -225 feet)
Step-by-step explanation:
My apologies in advance if this does not format the way its supposed to. The way I did it includes arrows and may work best on a computer.
Problem: A submarine that is 245 feet below sea level descends 83 feet and then ascends 103 feet. Which represents the location of the submarine compared to sea level.
Math: Ok, so we know that whenever something descends, that means it is going down, so let's use a negative sign. These means when something ascends, it goes up. Let's use a positive sign here. Also, note the fact that we start 245 feet below sea level. This means we should start at -245.
Now, using the data we have, let's create a math problem.
A submarine that is 245 feet below sea level descends 83 feet and then ascends 103 feet. Which represents the location of the submarine compared to sea level.
-245 <---- beginning level
-83 <---- the submarine descends
+103 <---- the submarine ascends
_______
?
So grab a calculator to do this part, or do it on your own. Once you finish, plug in the answer.
-245 -245
-83 -83
+103 ---------------> +103
______ ________
? -225 feet
So as you can see, the final answer would be -225 feet or 225 feet below sea level.
Hope this helped! Have a great day!
Select all of the following that are quadratic equations.
Answer:
x^2 -2x = 4x+1
2x^2 +12x = 0
9x^2 +6x -3=0
Step-by-step explanation:
A quadratic equation has the highest power of x being squared
x^2 -2x = 4x+1
2x^2 +12x = 0
9x^2 +6x -3=0
These are all quadratic equations
Find the length of the hypotenuse. 45 degree triangle 3 square root of
2
Answer:
Hypotenuse = 6
Step-by-step explanation:
Find attached diagram used in solving the question.
The triangle is a 45°-45°-90° triangle meaning it's two legs are equal. The opposite = adjacent
Since we are told to find hypotenuse, it means the length given = opposite = adjacent = 3√2
Hypotenuse ² = opposite ² + adjacent ²
Hypotenuse ² = (3√2)² + (3√2)²
Hypotenuse ² = 9(2)+9(2) = 18+18
Hypotenuse ² = 36
Hypotenuse = √36
Hypotenuse = 6
Please answer this correctly
Answer:
V = 615.44 mm^3
Step-by-step explanation:
The volume of a cylinder is given by
V = pi r^2h
The diameter is 14 so the radius is 14/2 = 7
V = 3.14 ( 7)^2 4
V = 615.44 mm^3
Answer:
Answer:
V = 615.44 mm^3
Step-by-step explanation:
The volume of a cylinder is given by
V = pi r^2h
The diameter is 14 so the radius is 14/2 = 7
V = 3.14 ( 7)^2 4
V = 615.44 mm^3
Step-by-step explanation:
Use each number only once. Add, subtract multiply, or divide to get an awnser of 3. Use all numbers, show your work
8,6,5,9,1
Answer:
these are my answers:
8-5=3
2÷6=3
5-2=3
2+1=3
3÷9=3
Answer:
9 +6 +1 -8 -5 = 3
Step-by-step explanation:
There are numerous possibilities. Among them are ...
9 +6 +1 -8 -5 = 3
(9-5)·1·6/8 = 3
(9·8)/(6·(5-1)) = 3
ANSWER A water tower in New York City has the shape of a cylinder with a cone on top. The cylinder has a diameter of 12 feet and a height of 15 feet. The roof has an inclination angle of 25o . There are 7.48 gallons in a cubic foot. If residents of an apartment building are using the water from the tower at an average rate of 56 gallons per minute, determine how long, to the nearest minute, it will take to drain the entire tower.
Answer:
241 minutes
Step-by-step explanation:
Given:
Height of cylinder, h = 15 ft
Radius, r = [tex] \frac{d}{2} = \frac{12}{2} = 6 [/tex] (both cylinder and cone have same radius)
Let's find the height of cone, since angle of inclination = 25°C.
[tex] tan25 = \frac{h}{r} [/tex]
[tex] h = r tan25 [/tex]
[tex] h = 6 tan25 = 2.8 [/tex]
Height of cone = 2.8 ft
Let's find colume of tower.
Volume = Volume of cone + volume of cylinder.
Formula for volume of cone = ⅓πr²h
Volume of cylinder = πr²h
Therefore,
V = ⅓πr²h + πr²h
V = ⅓π*6²*2.8 + π*6²*15
V = 105.558 + 1696.46
V = 1802.02 ft³
Since volume is 1802.02 ft³, and there are 7.48 gallons in a cubic ft, the total gallon =
1802.02 * 7.48 = 13479.11 gallons
Water is used at an average rate of 56 gallons per minute.
Amount if time to drain the water:
Total gallons / average rate
[tex] = \frac{13479.11}{56} = 240.698 [/tex]
≈ 241 minutes
Can someone please help? :)
Solution,
Diameter (d)=24 cm
Radius (r)=24/2 =12 cm
Circumference of circle= 2 pi r
=2*3.14*12
= 75.36 cm
Hope it helps
Good luck on your assignment
Answer:
[tex]c = 75.36cm[/tex]
Step-by-step explanation:
[tex]d = 2r \\ 24 = 2r \\ \frac{24}{2} = \frac{2r}{2} \\ r = 12cm[/tex]
[tex]circumference \\ = 2\pi \: r \\ = 2 \times 3.14 \times 12 \\ = 75.36cm[/tex]
hope this helps
brainliest appreciated
good luck! have a nice day!
An obtuse triangle has side lengths of (5.5x + 6.2y) centimeters, (4.3x + 8.3z )and (1.6z + 5.1y) centimeters. Which expression represents the perimeter, in centimeters of the obtuse triangle? PLZ HELP ASAP :)
Answer:
The expression [tex]9.8x+11.3y+9.9z[/tex] represents the perimeter, in centimeters of the obtuse triangle.
Step-by-step explanation:
An obtuse triangle is a triangle where one of the internal angles is obtuse (greater than 90 degrees).
The perimeter of a triangle is the total distance around the outside of a triangle, which can be found by adding together the length of each side. Or as a formula:
[tex]P=a+b+c[/tex]
where:
a, b and c are the lengths of each side of the triangle.
We know that the triangle has side lengths of [tex]a = 5.5x + 6.2y[/tex], [tex]b= 4.3x + 8.3z[/tex] and [tex]c=1.6z + 5.1y[/tex] centimeters. Therefore, the perimeter is
[tex]P=a+b+c\\P=(5.5x + 6.2y)+(4.3x + 8.3z)+(1.6z + 5.1y)\\\\\mathrm{Group\:like\:terms}\\P=5.5x+4.3x+6.2y+5.1y+8.3z+1.6z\\\\\mathrm{Add\:similar\:elements:}\\P=9.8x+11.3y+9.9z[/tex]
The scatter plot below shows one class of Spanish students’ time spent studying for their final versus the grade that they earned on the final. If a student studies for 75 minutes, what is the best estimate for his or her grade?
A.100
B.90
C.45
D.75
The indicated function y1(x) is a solution of the given differential equation. Use reduction of order or formula (5) in Section 4.2, y2 = y1(x) e−∫P(x) dx y 2 1 (x) dx (5) as instructed, to find a second solution y2(x). x2y'' + 2xy' − 6y = 0; y1 = x2
Here is the right and correct question:
The indicated function y1(x) is a solution of the given differential equation. Use reduction of order or formula (5) in Section 4.2,
[tex]y_2 = y_1 (x) \int\limits \dfrac{e ^{-\int\limits P(x) dx} }{y^2_1 (x)} dx \ \ \ \ \ (5)[/tex]
as instructed, to find a second solution [tex]y_2(x)[/tex]
[tex](1-2x-x^2)y''+2(1+x)y' -2y =0; \ \ \ y_1=x+1[/tex]
Answer:
[tex]y_2 = -2-x^2-x[/tex]
Step-by-step explanation:
Let take a look at the differential equation:
[tex](1-2x-x^2)y''+2(1+x)y' -2y =0[/tex]
So; [tex]y''+ \dfrac{2(1+x)}{(1-2x-x^2)}y' - \dfrac{2}{(1-2x-x^2)}y =0[/tex]
where;
[tex]P(x) = \dfrac{2(1+x)}{(1-2x-x^2)}[/tex] ;
Also:
[tex]Q(x) = \dfrac{-2}{(1-2x-x^2)}[/tex]
The task is to find the value of [tex]y_2(x)[/tex] by using the reduction formula [tex]y_2 = y_1 (x) \int\limits \dfrac{e^{-\int\limits P(x) dx }}{y_1^2(x)}dx[/tex] such that [tex]y_1(x) =x+1[/tex]
simplifying [tex]y_2 = y_1 (x) \int\limits \dfrac{e^{-\int\limits P(x) dx }}{y_1^2(x)}dx[/tex] ;we have:
[tex]y_2 =(x+1) \int\limits \dfrac{e ^{-\int\limits \frac{2(1+x)}{(1-2x-x^2)}}}{(x+1)^2} \ \ dx[/tex]
[tex]y_2 =(x+1) \int\limits \dfrac{e ^{\int\limits \frac{-2(1+x)}{(1-2x-x^2)}}}{(x+1)^2} \ \ dx[/tex]
[tex]y_2 =(x+1) \int\limits \dfrac{e^{In(1-2x-x^2)}}{(x+1)^2}\ \ dx[/tex]
[tex]y_2 =(x+1) \int\limits \dfrac{(1-2x-x^2)}{(x+1)^2} \ \ dx[/tex]
[tex]y_2 =(x+1) \int\limits \dfrac{1}{(x+1)^2}-\dfrac{2x}{(x+1)^2}- \dfrac{x^2}{(x+1)^2} \ \ dx[/tex]
Let assume that [tex]I_1[/tex] = [tex]\int\limits \dfrac{-2x}{(x+1)^2} \ \ dx[/tex]
[tex]= \int\limits \dfrac{-(2x+2-2) }{(x+1)^2} \ \ dx[/tex]
[tex]= \int\limits \dfrac{-(2x+2) }{(x+1)^2} + \dfrac{2}{(x+1)^2} \ \ dx[/tex]
[tex]=- In(x+1)^2 - \dfrac{2}{(x+1)}[/tex]
Also : Let [tex]I_2 = \int\limits \dfrac{x^2}{(x+1)^2} \ \ dx[/tex]
[tex]= \int\limits \dfrac{(x+1-1)^2}{(x+1)^2} \ \ dx[/tex]
[tex]= \int\limits \dfrac{(x+1)^2+1-2(x+1)}{(x+1)^2} \ \ dx[/tex]
[tex]= \int\limits \ 1 + \dfrac{1}{(x+1)^2}- \dfrac{2}{(x+1)} \ \ dx[/tex]
[tex]= x - \dfrac{1}{(x+1)}- 2 \ In (x+1)[/tex]
Replacing the value of [tex]I_1[/tex] and [tex]I_2[/tex] in the equation
[tex]y_2 =(x+1) \int\limits \dfrac{1}{(x+1)^2}-\dfrac{2x}{(x+1)^2}- \dfrac{x^2}{(x+1)^2} \ \ dx[/tex]
[tex]y_2 =(x+1) [ \ \int\limits \dfrac{-1}{(x+1)}+ (-In(x+1)^2-\dfrac{2}{(x+1)})-(x-\dfrac{1}{(x+1)}-2 In(x+1))][/tex]
[tex]y_2 =(x+1) [ \ \int\limits \dfrac{-1}{(x+1)}- In(x+1)^2-\dfrac{2}{(x+1)}-x+\dfrac{1}{(x+1)}+2 In(x+1))][/tex]
[tex]y_2 =(x+1) [ \ \int\limits \dfrac{-1}{(x+1)}- 2In(x+1) -\dfrac{2}{(x+1)}-x + \dfrac{1}{(x+1)} +2 In(x+1)][/tex]
[tex]y_2 = -2-x(x+1)[/tex]
Therefore;
[tex]y_2 = -2-x^2-x[/tex]
PLEASE HELP ITS URGENT! 20 POINTS WORTH (basic inverse function question)
Answer:I believe the answer is -1,-4 lies on the graph
Step-by-step explanation:
Suppose a basketball player has made 184 out of 329 free throws. If the player makes the next 2 free throws, I will pay you $24. Otherwise you pay me $12. Step 1 of 2 : Find the expected value of the proposition. Round your answer to two decimal places. Losses must be expressed as negative values.
Answer:
The expected value of the proposition is -$12.74.
Step-by-step explanation:
Expected value:
It is the multiplication of each outcome by it's probability.
For each free throw, there are only two possible outcomes. Either the player makes, or he does not. Each free throw is independent of each other. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
In which [tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
And p is the probability of X happening.
Suppose a basketball player has made 184 out of 329 free throws.
This means that [tex]p = \frac{184}{329} = 0.5593[/tex]
2 free throws:
This means that [tex]n = 2[/tex]
Probability of making two free throws.
This is P(X = 2).
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
[tex]P(X = 2) = C_{2,2}.(0.5593)^{2}.(0.4407)^{0} = 0.3128[/tex]
Expected value:
If he makes both free throws, you earn $12. So 0.3128 probability of you earning $12.
Otherwise, you have to pay $24. 1 - 0.3128 = 0.6872 probability of you losing $24.
So
E = 0.3128*12 - 0.6872*24 = -12.74
The expected value of the proposition is -$12.74.
Answer:
-.74
Step-by-step explanation:
I just did the homework and this is the correct answer
The dimensions of a triangular pyramid are shown below. The height of the pyramid is 6 inches. What is the volume in cubic inches? 1 point
Answer:
[tex]V=\frac{1}{3}(2.5)(6)=5 \ in^{3}[/tex]
The volume of the pyramid is 5 cubic inches.
Step-by-step explanation:
Assuming that the triangle base dimensions are 1 inche and 5 inches, and the height of the pyramid is 6 inches, the volume would be
[tex]V=\frac{1}{3}Bh[/tex]
Where B is the area of the base (triangle) and h is the height.
[tex]B=\frac{1}{2}bh =\frac{1}{2}(1)(5)=2.5 \ in^{2}[/tex]
Then,
[tex]V=\frac{1}{3}(2.5)(6)=5 \ in^{3}[/tex]
Therefore, the volume of the pyramid is 5 cubic inches.
Which of following equations are identities. Check all that apply.
A. csc x = 1/sin x
B. tan x = 1/sec x
C. sec x = 1/csc x
D. tan x = sin x/cos x
Answer: its A and D
Step-by-step explanation:
Ape x
The trigonometric identities are (csc x = 1/sinx ) and ( tan x = sin x/cos x ). Hence, option A and option D are correct.
What is trigonometry?The branch of mathematics sets up a relationship between the sides and the angles of the right-angle triangle termed trigonometry.
The trigonometric identities are ( csc x = 1/sinx ) and ( tan x = sin x/cos x ). The other two options are incorrect. The correct values for the other two options are tan x = 1/cot x and sec x = 1/cos x.
Hence, option A and option D are correct.
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h(t)=-16t^2+24t+40.0
Answer:
t = -1 or 5/2
Step-by-step explanation:
To find t; we equate H(t) = 0
-16t^2+24t+40.0= 0
dividing through by 8 we have ;
-16t^2 / 8+ 24t/8+40.0/8=0
-2t^2 + 3t + 5=0
-2t^2 + 5t -2t + 5=0
By factorisation;
t(-2t + 5) +1 (-2t + 5)=0
This means;
(t + 1)(-2t +5)= 0
t + 1 = 0 or -2t + 5 = 0;
t= -1 ; -2t = -5
2t = 5
t = 5/2;
Hence t = -1 or 5/2
What is the answer? Evaluate.
If 75 g of active ingredient powder is mixed with 400 mL NS solution, what is the final concentration? Round to the nearest hundredths (w/v).
75g/400ml: Simplify per unit
÷ by bottom.
0.1875g/ml nearest hundredth
0.19g/ml
What two methods are the best choices to factor this expression?
18x2-8
-Factor by grouping.
-Factor out the GCF.
-Use the difference of squares rule.
-Use the perfect square trinomial rule.
Answer:
- Factor by grouping. - Factor out the GCF.Step-by-step explanation:
Given the expression 18x²-8, the best method to factor this expression are Factor by grouping and by factoring out the greatest common factor.
Step 1: Factor by grouping
Factor by grouping is done by creating a smaller groups from each term in the expression as shown;
18x² = (2*3*3* x²)
8 = 2*2*2
18x²-8 = (2*3*3* x²) - (2*2*2)
Step 2: Then we will factor out the greatest common factor (GCF) in the expression. GCF is the value that is common to both terms of the expression. The only common term in this case is 2.
Answer:
Factor out the GCF, and Use the difference of squares rule.
Step-by-step explanation:
The terms in the expression have a common factor of 2, so the first step is to factor out the GCF:
2(9x2 − 4).
Then, factor the remaining expression using the difference of squares rule.
Some accounting firms give the client an option to pay a fee when the tax return is completed that guarantees tax advices and support from the accountant if the client were audited. A large accounting firm is trying to determine what fee to charge for nextyear's returns. In previous years, the actual mean cost to the firm for attending a client audit session was $690. To determine if this cost has changed, the firm randomly samples 35 client audit fees. The sample mean audit cost was $700 with a standard deviation of $65.
Required:
a. Develop a 90% confidence interval estimate for the mean audit cost.
b. Based on your confidence interval, what do you think of the claim that the mean cost has changed?
1. The interval does not contain the historical data mean $690, which supports claim the mean cost has changed.
2. The interval contains historical data mean $690, which supports the claim the mean cost has changed.
3. The interval does not contains historical data mean $690, which does not support the claim it has changed.
4. The interval contains historical data mean $690, which does not support the claim the mean cost has changed.
Answer:
a) $700+/-$18.07
Therefore,the 90% confidence interval (a,b)
= ($681.93, $718.07)
b) 4. The interval contains historical data mean $690, which does not support the claim the mean cost has changed.
Step-by-step explanation:
Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.
The confidence interval of a statistical data can be written as.
x+/-zr/√n
Given that;
Mean x = $700
Standard deviation r = $65
Number of samples n = 35
Confidence interval = 90%
z(at 90% confidence) = 1.645
a. Develop a 90% confidence interval estimate for the mean audit cost.
Substituting the values we have;
$700+/-1.645($65/√35)
$700+/-1.645($10.98700531147)
$700+/-$18.07362373736
$700+/-$18.07
Therefore,the 90% confidence interval (a,b) = ($681.93, $718.07)
b) Since, $690 is contained between the 90% confidence interval of ($681.93, $718.07). It implies that the mean cost has not changed.
4. The interval contains historical data mean $690, which does not support the claim the mean cost has changed.
Wind Mountain is an archaeological study area located in southwestern New Mexico. Potsherds are broken pieces of prehistoric Native American clay vessels. One type of painted ceramic vessel is called Mimbres classic black-on-white. At three different sites the number of such sherds was counted in local dwelling excavations.
Site I Site II Site III
51 47 33
45 19 57
32 9 62
19 18 28
25 28
57 22
35
Shall we reject or not reject the claim that there is no difference in population mean Mimbres classic black-on-white sherd counts for the three sites? Test given b807b7c2-a348-4cb7-8322-f58461059cce.GIF.
What is the level of significance?
a. 90%
b. 1%
c. 5%
d. 99%
e. 95%
Answer:
Step-by-step explanation:
Hello!
This is an example of an ANOVA hypothesis test, where you'll compare the population means of the number of broken Mimbres in three different excavation sites.
The variable of interest is
Y: Number of broken pieces of prehistoric Native American clay vessels, called Mimbres in an excavation site.
Factor: Site
Treatments: 1, 2, 3
You are asked to identify the level of significance of the test. This value is the probability of committing Type I error, that is, when you fail to reject a false null hypothesis and is always represented with the Greek letter alpha "α"
This level is determined by the researcher when he is designing the experiment and statistical analysis. Normally you'd want this level to be as small as possible to be sure you didn't commit any mistake when deciding over the hypotheses.
The mos common values are 0.01, 0.05 or 0.1 and it can also be expressed as percentages 1%, 5% or 10%. Having a probability of making a mistake greater than 10% is too high so normally you would not encounter significance levels greater than 10%
With this in mind options b. 1% and c. 5% are valid values for α.
Have a nice day!
Next time check that all the information is copied!
Choose the slope Y intercept that corresponds with the graph
Answer:
A
Step-by-step explanation:
First, find the y-intercept by seeing where the line goes through the y-axis
This is at (0, -2) so the y-intercept is -2.
Then, use rise over run to find the slope.
The slope is -3
Answer:
A. Slope -3, y- intercept -2
Step-by-step explanation:
Well the line passes through the point (0,-2) and from there if you draw a line 1 to the left (run) and then up 3(rise) you connect with the line, so the slope is -3(rise over run)
Hope this helps,
plx give brainliest
The area of trapezoid TRAP is 100. Furthermore, TR=32, AP=8, and TP=RA. If
Answer:
TP = 13
Step-by-step explanation:
The height of the trapezoid can be found from the area formula:
A = (1/2)(b1 +b2)h
h = 2A/(b1 +b2) = 2(100)/(32 +8)
h = 5
The horizontal length of each triangular end of the trapezoid is ...
(32 -8)/2 = 24/2 = 12
so the hypotenuse of the triangular end of the trapezoid is ...
TP = √(12^2 +5^2) = √169
TP = 13
The sides of the trapezoid have length 13 units.
7d = _____ hours. who ever answers first gets a reward...
Mary crocheted a rectangular blanket whose diagonal measures approximately 7.21 feet. What are the most likely length and width measurements of the blanket ? Select the two correct answers.
Answer:
If both sides are integers, one side will be 4 feet and the other will be 6 feet. The other solution is the symmetrical solution (4 feet instead of 6 feet, and 6 feet instead of 4 feet).
Step-by-step explanation:
We have a rectangular blanket, that has a diagonal that measures h=7.21 feet.
The two sides of the rectangle a and b can be related to the diagonal h by the Pithagorean theorem:
[tex]a^2+b^2=h^2[/tex]
Then, we can express one side in function of the other as:
[tex]a^2+b^2=h^2\\\\a^2=h^2-b^2\\\\a=\sqrt{h^2-b^2}=\sqrt{7.21-b^2}=\sqrt{52-b^2}[/tex]
Then, if we define b, we get the value of a that satisfies the equation.
A graph of values of a and b is attached.
If both side a and b are integers, we can see in the graph that are only two solutions: (b=4, a=6) and (a=4, b=6).
A high school football coach is trying to decide which quarterback he should start in next week’s game. He examines the win/lose record for the two quarterbacks. Which quarterback should he start? Explain
The player / wins/ losses
Germaine / 8 / 5
Gabriel / 7 / 4
Answer:
Gabriel has the highest proportion of wins, so he should start.
Step-by-step explanation:
He should start the quarterbacks with the highest proportion of wins.
The proportion of wins is the number of games won divided by the number of games played(wins + losses).
We have that:
Germaine has 8 wins in 8+5 = 13 games. So his proportion of wins is 8/13 = 0.6154.
Gabriel has 7 wins in 7+4 = 11 games. 7/11 = 0.6364
Gabriel has the highest proportion of wins, so he should start.
Find the value of 5(x - y)
Answer:
= 5x-5y
Step-by-step explanation:
Multiply 5to x and y
Answer:
5x-5y
Step-by-step explanation:
multiply both the terms x and y by 5.
A line is parallel to y = 3x + 8 and
intersects the point (-3, 7). What is the
equation of this parallel line?
y = [?]X + [ ]
Answer:
y= 3x+16
Step-by-step explanation:
y = 3x + 8 ║ y= mx +b
Since lines are parallel, m=3
y= 3x+b
(-3, 7) intersect
7= 3*(-3) + bb= 7+9b= 16y= 3x+16
Sugar canes have lengths X that are normally distributed with mean 365.45 cm and standard deviation 4.9 cm what is the probability of the length of a randomly selected Cane being between 360 and 370 cm
Answer:
The probability of the length of a randomly selected Cane being between 360 and 370 cm P(360 ≤X≤370) = 0.6851
Step-by-step explanation:
step(i):-
Let 'X' be the random Normal variable
mean of the Population = 365.45
Standard deviation of the population = 4.9 cm
Let X₁ = 360
[tex]Z= \frac{x-mean}{S.D}= \frac{360-365.45}{4.9}[/tex]
Z₁ = -1.112
Let X₂ = 370
[tex]Z= \frac{x-mean}{S.D}= \frac{370-365.45}{4.9}[/tex]
Z₂ = 0.911
Step(ii):-
The probability of the length of a randomly selected Cane being between 360 and 370 cm
P(x₁≤x≤x₂) = P(z₁≤Z≤z₂)
P(360 ≤X≤370) = P(-1.11≤Z≤0.911)
= P(Z≤0.911)-P(Z≤-1.11)
= 0.5 +A(0.911) - (0.5-A(1.11)
= 0.5 +A(0.911) - 0.5+A(1.11)
= A(0.911) + A(1.11)
= 0.3186 + 0.3665
= 0.6851
The probability of the length of a randomly selected Cane being between 360 and 370 cm P(360 ≤X≤370) = 0.6851
The housing commission of King County is interested in finding out more about the number of rental units that qualify as low-income housing but do not meet the minimum standard living requirements in Seattle and Renton. Units are randomly selected in both cities. Of the 85 low-income units sampled in Seattle (City 1), 17 do not meet minimum requirements. Of the 80 units sampled in Renton (City 2), 24 do not meet minimum requirements. The value of the z-statistic for testing equality of the proportion of low-income rental units that do not meet minimum standards in the two cities is
a) z=-2.33
b) none of these choices
c) Z=-1.96
d) Z= -1.49
e) z=-1.65
Answer:
d) Z= -1.49
Step-by-step explanation:
sample #1 ----->
first sample size,[tex]n_1= 85[/tex]
number of successes, sample 1 = [tex]x_1= 17[/tex]
proportion success of sample 1 ,
[tex]\bar p_1= \frac{x_1}{n_1} = 0.2000000[/tex]
sample #2 ----->
second sample size,
[tex]n_2 = 80[/tex]
number of successes, sample 2 = [tex]x_2 = 24[/tex]
proportion success of sample 1 ,
[tex]\bar p_2= \frac{x_2}{n_2} = 0.300000[/tex]
difference in sample proportions,
[tex]\bar p_1 - \bar p_2 = 0.2000 - 0.3000 \\\\= -0.1000[/tex]
pooled proportion ,
[tex]p = \frac{ (x_1+x_2)}{(n_1+n_2)}\\\\= 0.2484848[/tex]
std error ,
[tex]SE=\sqrt{p*(1-p)*(\frac{1}{n_1}+\frac{1}{n_2} )} \\\\=0.06731[/tex]
Z-statistic = [tex](\bar p_1 - \bar p_2)/SE = ( -0.100 / 0.0673 ) = -1.49[/tex]
Write a differential equation that is a mathematical model of the situation described. The time rate of change in the temperature T of coffee is proportional to the difference between the fixed temperature M of the air at time t and the temperature of the coffee at time t. The differential​ equation, with proportionality constant​ k, is nothing.
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