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Viktor [21]
3 years ago
14

Explain how to calculate this mentally

Mathematics
2 answers:
LekaFEV [45]3 years ago
7 0

Answer:

1. 50℅

2. 25℅

3. 60℅

hope it helps.

djyliett [7]3 years ago
4 0

Answer:

Below.

Step-by-step explanation:

1. Divide 15 by 30 which is  1/2.

Then multiply 1/2 by 100 = 50%.

2.  3/12 = 1/4

1/4 * 100 = 25%

3.  6/10 = 0.6

0.6 * 100 = 60%.

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A decimal that stops (like 2.48) is which type of number?
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Step-by-step explanation:

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A group of penguins swam 4/5 mile in 1/3 hour. Use the table to find how many miles the penguins swam in one hour if they swam a
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Answer:

2.4 miles

Step-by-step explanation:

This is a simple ratio problem.

Penguins go 4/5 mile in 1/3rd hour. <em>So how many miles will they go in 1 hour? Let that be x:</em>

<em>\frac{\frac{4}{5}}{\frac{1}{3}}=\frac{x}{1}\\\frac{1}{3}x=\frac{4}{5}\\x=\frac{4}{5}*3=\frac{12}{5}</em>

<em />

<em>That is 12/5 miles or 2  2/5 miles</em>

<em>In decimal, that's </em><em>2.4 miles</em>

3 0
2 years ago
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Fourteen percent of the town’s population are above the age of 65. If there are about
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Answer:

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Step-by-step explanation:

6 0
3 years ago
Martha is training for a duathlon, which includes biking and running. She knows that yesterday she covered a total distance of o
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<u>Answer:</u>

<u>Distance:</u> 6x + 15.5y > 55.5

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We are given that Martha is training for a duathlon and she covered a total distance of over 55.5 miles in more than than 4.5 hours of training.

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