All categories

4 years ago

Help me please? ASAP. 10 points??

Mathematics

1 answer:

alex41 [277]4 years ago

8 0

Answer:

D) 16x^2 + 4x

Step-by-step explanation:

So a since there is two lengths and two height, you are gonna have to add them all up.

5x^2 + 2x + 5x^2 + 2x + 3x^2 + 3x^2

(See why I put the length value and width value twice? Because there is two of each.)

Now start adding up common factors. Let's start with any x^2

10x^2+2x + 2x + 6x^2

I added up the 5x^2 together to get 10x^2 and I added the 3x^2 together to get 6x^2, now you are gonna add those two up

16x^2 + 2x + 2x

(Just from looking at this, you can easily cross out answers A and B)

Now add the x together

16x + 4x

So the the answer is D

You might be interested in

Joe and Beth both wash cars for extra cash. Joe charges a base fee of $15 and $8 per car after that. Beth charges a base fee of

Ksenya-84 [330]

Answer:

C- 15 cars.

Step-by-step explanation:

To do this, you will need to set up an equation as follows:

8x+15=6x+45

Then you will subtract 6x from each side. Then you will have this:

2x+15=45

Then you will subtract 15 from each side, and then you will have:

2x=30

Then you will divide each side by 2 and you will get 15. Hope this helped!

8 0

4 years ago

Slope-Intercept Form of 3x – 4y – 16 = 0

mojhsa [17]

Answer:

Y= 3/4x - 4

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Dwayne Wade made 439 field goals out of 937 attempts. What was Dwayne Wade's ratio of successful field goals to attempt?

Serhud [2]

Let's set this ratio up as a fraction: (successful field goals)/(field goal attempts)
There were 439 successful field goals and 937 attempts: 439/937
The fraction cannot be reduced, so the ratio is 439/937.

8 0

3 years ago

Read 2 more answers

10.

Kay [80]

Answer:

$\frac{(82)(2.4)^2}{104.139} \leq \sigma^2 \leq \frac{(82)(2.4)^2}{62.132}$

$4.535 \leq \sigma^2 \leq 7.602$

Now we just take square root on both sides of the interval and we got:

$2.2 \leq \sigma \leq 2.8$

And the best option would be:

A. 2.2 < σ < 2.8

Step-by-step explanation:

Information provided

$\bar X=32.1$ represent the sample mean

$\mu$ population mean

s=2.4 represent the sample standard deviation

n=83 represent the sample size

Confidence interval

The confidence interval for the population variance is given by the following formula:

$\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma^2 \leq \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}$

The degrees of freedom are given by:

$df=n-1=83-1=82$

The Confidence is given by 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , the critical values for this case are:

$\chi^2_{\alpha/2}=62.132$

$\chi^2_{1- \alpha/2}=104.139$

And replacing into the formula for the interval we got:

$\frac{(82)(2.4)^2}{104.139} \leq \sigma^2 \leq \frac{(82)(2.4)^2}{62.132}$

$4.535 \leq \sigma^2 \leq 7.602$

Now we just take square root on both sides of the interval and we got:

$2.2 \leq \sigma \leq 2.8$

And the best option would be:

A. 2.2 < σ < 2.8

3 0

3 years ago

What is the value of y?

mrs_skeptik [129]

Ok so you would start by getting rid of the fraction. You should know the steps for that by now but here this is what it would look like
3y/4+10=2y/4 Simplify
3y/4+10=1y/2
10=-1y
I really simplified the last part but this is what it looks like: $\frac{2y}{4}$ - $\frac{3y}{4}$ = -1y
10=-1y
y=-10

8 0

3 years ago

Read 2 more answers