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3 years ago

An envelope is 3 inches wide with a total area of 30 square inches. What is height?

Mathematics

2 answers:

lord [1]3 years ago

5 0

The answer would be ten because 3 times ten is thirty and ten divided by three is ten

solniwko [45]3 years ago

3 0

Since the TOTAL area is 30 square inches, what you would do is divide 30/3, since you already know how wide it is. And the answer is 10. The envelope is 10 inches tall.

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Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

If a = 12 and 120% of a is equal to 80\% of bthen what is a + b ?

Novosadov [1.4K]

Answer:

The answer is 30

Step-by-step explanation:

First you have to find 120% of a (12).

$\frac{12}{1} \times \frac{120}{100} = 14.4$

Therefore; 14.4 is 80% of b, and we are trying to find 100% of b

$14.4 = 80\% \\ x = 100\%$

we do not know what is 100% therefore we call it *x*. In order to find this unknown value *x* we cross multiply.

$14.4 \times 100\% = 80\% \times x$

This is the same as saying;

$14.4 \times 1 = x \times \frac{4}{5}$

100% percent would be 1 because it is the whole number we are trying to find. The 80% would be 4/5. To get 4/5 you can simply break down 80/100 ( this is 80% as a fraction).

so the new equation is: 14.4= 4/5x

We divide both sides by 4/5. Then we will get x tobe equal to 18. Therefore b is 18. We were asked to find (a + b) so. 18+12 = 30

4 0

1 year ago

Roger completed a probability experiment with a coin. He flipped the coin 32 times, and it landed on tails eight times. He looke

pav-90 [236]

1 to 3

Since you know that he landed on tails 8 out of 32 times, he must have flipped heads for the flips he did not flip tails. So, subtract 32 minus 8, which equals 24, and your answer is 8 to 24. Simplify this like you would with a fraction; the greatest common factor is 8 so divide the "numerator" and the "denominator" by 8. Therefore your final answer is 1 to 3.

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3 years ago

Read 2 more answers

the jones family wants to enclose their circular garden with a fence. to the nearest foot , what is the minimum length of fencin

Elena L [17]

Answer:

The answer is D. 393ft

Step-by-step explanation:

So if you do 62.5•2=125

Then you do 125•3.14=392.5

After that then you round 392.5 and you get 393

theres your answer.

7 0

3 years ago