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irga5000 [103]
4 years ago
9

Factor k2 - 81. (k + 9)(K + 9) (k - 9)(k - 9) (k - 9)(k + 9)

Mathematics
2 answers:
Ronch [10]4 years ago
8 0

Answer:

(

k

+

9

)

(

k

−

9

)

(k+9)(k-9)

Step-by-step explanation:

Zarrin [17]4 years ago
4 0

Answer:

It's C

Step-by-step explanation:

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Liam wants to estimate the percentage of people who lease a car. He surveys 240 individuals and finds that 54 lease a car. Find
scoundrel [369]

Answer:

ME= z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}

The confidence interval is 95% and the significance level is \alpha=1-0.95=0.05 and \alpha/2 =0.025 and the critical value would be:

z_{\alpha/2}= 1.96

And the margin of error would be:

ME = 1.96 \sqrt{\frac{0.225 (1-0.225)}{240}}= 0.0528

Step-by-step explanation:

We have the following info given:

n =240 the sample size selected

X=54 the number of people who lease a car

\hat p =\frac{54}{240}= 0.225 the estimated proportion of people who lease a car

The margin of error is given by:

ME= z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}

The confidence interval is 95% and the significance level is \alpha=1-0.95=0.05 and \alpha/2 =0.025 and the critical value would be:

z_{\alpha/2}= 1.96

And the margin of error would be:

ME = 1.96 \sqrt{\frac{0.225 (1-0.225)}{240}}= 0.0528

6 0
3 years ago
Solve the system of equations:<br> y = x-4<br> -2x + y = 18
Pie

Answer:

x = 7.3

Step-by-step explanation:

-2x + x-4 = 18

First, Combine Like Terms

-3x + (-4) = 18

Then, do Inverse Operations

-3x + -4 = 18

       + 4   +4

Cancel out the -4 +4 because it will equal zero and won't matter to the equation

-3x = 22

Do Inverse Operations again. In this case, you will divide.

-3x = 22

-3x/-3 = 22/-3

Cancel out the -3x/-3

22/-3 = x

7.3 = x

6 0
3 years ago
The volume of a one with a slant height of 50 inches and a diameter of 60 inches (approximate pi
mestny [16]

Answer:

hmgh

Step-by-step explanation:

gghfgh

5 0
3 years ago
What is the result ?
yuradex [85]

Answer:

5+0=5 5+1+0=6 56

4+2=6 3+4+2=9 69

2+1=3 6+2+1=39

or

Step-by-step explanation:

there are 2 ways

3 0
3 years ago
Read 2 more answers
What is the value of x?<br> sin 55' = COS 3<br> Fnter your answer in the box
vivado [14]
Bro be careful with the link
6 0
3 years ago
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