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Andrew [12]
3 years ago
12

Im new someone please help​

Mathematics
1 answer:
Novosadov [1.4K]3 years ago
6 0

Angle 3 and 4 are supplementary angles and create a straight line.

This means when added together they need to equal 180 degrees.

Angle 3 = 180 - angle 4

Angle 3 = 180-40 = 140 degrees.

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The area of a rectangle is (x4 + 4x3 + 3x2 – 4x – 4), and the length of the rectangle is (x3 + 5x2 + 8x + 4). If area = length ×
astraxan [27]

Answer:

Width = x-1

Step-by-step explanation:

Given

Area of rectangle=A= x^4+4x^3+3x^2-4x-4

Length of Rectangle=L= x^3+5x^2+8x+4

We have to find width

Width of rectangle=W= ?

We know that the formula for the area of triangle is:

Area of Rectangle=Length*Width

A=L*W

Since we need the value of width, length will be moved to the left of equals to.

A/L=W

W= (x^4+4x^3+3x^2-4x-4)/(x^3+5x^2+8x+4)

After long division, we will get

Width=W=x-1

8 0
3 years ago
Read 2 more answers
Historically, the mean yield of corn in the United States has been 120 bushels per acre with a standard deviation of 12. A surve
Illusion [34]

Answer:

z=\frac{125-120}{\frac{12}{\sqrt{40}}}=2.64    

P-value

Since is a two sided test the p value would be:  

p_v =2*P(z>2.64)=0.0082  

And the best answer would be

B 0.0082

Step-by-step explanation:

Data given and notation  

\bar X=125 represent the mean height for the sample  

\sigma=12 represent the population standard deviation

n=40 sample size  

\mu_o =120 represent the value that we want to test

\alpha represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the true mean is 120 or not, the system of hypothesis would be:  

Null hypothesis:\mu = 120  

Alternative hypothesis:\mu \neq 120  

If we analyze the size for the sample is > 30 and we know the population deviation so is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:  

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}  (1)  

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic

We can replace in formula (1) the info given like this:  

z=\frac{125-120}{\frac{12}{\sqrt{40}}}=2.64    

P-value

Since is a two sided test the p value would be:  

p_v =2*P(z>2.64)=0.0082  

And the best answer would be

B 0.0082

4 0
3 years ago
Will give BRAINLIEST, please answer quickly, easy question
Naya [18.7K]

Answer:

A =576 pi in ^2

Step-by-step explanation:

Circumference  is given by

C = 2 * pi *r

48 pi = 2 * pi *r

divide by 2 pi

48 pi /2 pi = 2 * pi * r / 2 pi

24 = r

We can find the area by

A = pi r^2

A = pi (24)^2

A =576 pi in ^2

8 0
2 years ago
Read 2 more answers
PLEASE HELP (TIMED TEST) WILL GIVE EXTRA POINTS
MrRa [10]

Answer:

The answers are A And B.

Step-by-step explanation:

Hope you pass!

6 0
2 years ago
Read 2 more answers
Please i need help :/
lozanna [386]

Answer:

d

Step-by-step explanation:

3 0
3 years ago
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