All categories

3 years ago

PLEASE HELP ASAP!!! 7th Grade Math.

Mathematics

1 answer:

Otrada [13]3 years ago

7 0

Answer:

1,300

Step-by-step explanation:

First, we need to substitute all the variable with the given number.

To figure out the 2 equivalent squares, do 20 x 20 , which is 400.

Then, the 3rd triangle, do 28 x 25 , equaling 700.

Lastly, for the 2 triangles, 20 x 20 / 2 , leading to the solution of 200.

Now, putting everything together by adding 400+700+200, the final answer is 1,300.

I hope this helped!!

~ Penny

You might be interested in

Your paycheck is $800 every two weeks. Each month, your fixed expenses include the following: $675 for rent; $200 for utilities;

kobusy [5.1K]

Answer:

Gary earned a gross pay of $1,047.30 last week. Using the fact that Social Security tax is 6.2% of gross pay, determine the amount of Social Security tax deducted from Gary's gross pay.

$6.49

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

<img src="https://tex.z-dn.net/?f=n%20-%205%20%5Cleqslant%205n%20-%201" id="TexFormula1" title="n - 5 \leqslant 5n - 1" alt="n -

ANTONII [103]

Hello there!

n - 5 ≤ 5n - 1

Solve for n

Let's start by subtracting 5n from both sides

n - 5 - 5n ≤ 5n - 5n - 1

n - 5 - 5n ≤ -1

We need to transfer -5 on the other side, we can do that by adding 5 on both sides

n - 5 - 5n + 5 ≤ -1 + 5

n - 5n ≤ -4

-4n ≤ -4

Finally divide both sides by -4

-4n/-4 ≤ -4/-4

n ≥ -1 (This is the answer)!

Do you know why I changed the sign?

A lot of students failed to remember that rules, which is:
When you are solving an inequality, if you divide both sides by a negative sign, you MUST change the symbol as well. If it was this <, it will change to this >. Got it? Cool!

I hope the steps are clear to understand. If you have questions, feel free to let me know...

As always, I am here to help!

7 0

3 years ago

A towel has a repeating pattern of two green stripes, then 3 blue stripes, and then 1 yellow stripe. If the towel has 20 stripes

EleoNora [17]

The answer would be a total of 9 blue stripes.

4 0

3 years ago

Some transportation experts claim that it is the variability of speeds, rather than the level of speeds, that is a critical fact

scZoUnD [109]

Answer:

Explained below.

Step-by-step explanation:

The claim made by an expert is that driving conditions are dangerous if the variance of speeds exceeds 75 (mph)².

(1)

The hypothesis for both the test can be defined as:

H₀: The variance of speeds does not exceeds 75 (mph)², i.e. σ² ≤ 75.

Hₐ: The variance of speeds exceeds 75 (mph)², i.e. σ² > 75.

(2)

A Chi-square test will be used to perform the test.

The significance level of the test is, α = 0.05.

The degrees of freedom of the test is,

df = n - 1 = 55 - 1 = 54

Compute the critical value as follows:

$\chi^{2}_{\alpha, (n-1)}=\chi^{2}_{0.05, 54}=72.153$

Decision rule:

If the test statistic value is more than the critical value then the null hypothesis will be rejected and vice-versa.

(3)

Compute the test statistic as follows:

$\chi^{2}=\frac{(n-1)\times s^{2}}{\sigma^{2}}$

$=\frac{(55-1)\times 94.7}{75}\\\\=68.184$

The test statistic value is, 68.184.

Decision:

$cal.\chi^{2}=68.184$

The null hypothesis will not be rejected at 5% level of significance.

Conclusion:

The variance of speeds does not exceeds 75 (mph)². Thus, concluding that driving conditions are not dangerous on this highway.

7 0

3 years ago

What is the value of V81 <img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B81%7D%20" id="TexFormula1" title=" \sqrt{81} " alt="

SpyIntel [72]

Answer: The value is 9

5 0

2 years ago

PLEASE HELP ASAP!!! 7th Grade Math.​

PLEASE HELP ASAP!!! 7th Grade Math.