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2 years ago

Which expression is equal to 8? A. 25-22 B. 25.22 C. 8-3.82 D. 83.82

Mathematics

1 answer:

SpyIntel [72]2 years ago

7 0

Answer:

D I guess is the answer for the question

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The correct answer is 61

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3 years ago

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T=pd/2x solve for X i always get confused when theirs more then one letter

Ainat [17]

When there's more than one letter, and you just have to solve for one variable, you can just solve it like you would any other equation. Treat the other variables like numbers and add, subtract, multiply, and divide them to both sides of the equation in order to isolate the variable you want to solve for.

$t= \frac{pd}{2x} \\ \\ t*2x= \frac{pd}{2x}*2x \\ \\ 2tx=pd \\ \\ \frac{2tx}{2t} = \frac{pd}{2t} \\ \\ x=\frac{pd}{2t}$

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2 years ago

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You need to buy a new cover for a pool.The pool is in shape of a trapezoid.The cost of the cover is .79.What is the total cost

jek_recluse [69]

Since we don't have the measurements for the trapezoid, we can't find the exact cost. However, I can explain how to solve the problem.

First, you need to find the the total area of the pool cover. Since it is in the shape of a trapezoid, use the formula below.

A = 0.5(h)(the sum of the bases)

Once you have the area, multiply by 0.79 and you will have the cost.

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2 years ago

Question 3

avanturin [10]

Answer:

I think 1

I think 2

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3 years ago

Grace is looking at a report of her monthly cell-phone usage for the last year to determine if she needs to upgrade her plan. Th

Alisiya [41]

Answer:

s ≈ 105

Step-by-step explanation:

Given:

The data set: 700, 735, 680, 890, 755, 740, 670, 785, 805, 1050, 820, 750

To find:

The standard deviation of the data

Steps:

To find the standard deviation, first write the computational formula for the standard deviation of the sample.

${s}= \sqrt{\frac{{\sum}{x^2} - \frac{({\sum}{x})^2}{n}}{n - 1}}$

Take the square root of the answer found in step 7 above. This number is the standard deviation of the sample. It is symbolized by $s$ . Here, we round the standard deviation to the nearest whole number.

${s} = \sqrt{10987.878787879} = 104.8231$

Rounding to the nearest whole number:

s ≈ 105

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1 year ago