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3 years ago

13

A science club at Emily's middle school has 25 members. Only 40% of the members attend the Saturday meetings. What is the number

of members that did not attend the Saturday meetings?
A : 9

B : 15

C : 10

D : 12

1 answer:

irakobra [83]3 years ago

6 0

The answer is B:15
Because 60% didn’t go and since 25 is a quarter of 100, 15 is a quarter of 60.

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3x – 15 = 39<br> =<br> What does x equal

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3x - 15 = 39
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love history [14]

For every 1 cup of blue paint, $\frac{10}{4}$ cups of red paint are needed

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<em><u>Solution:</u></em>

Given that, there are 3 1/3 red cups of paint for every 1 1/3 cups of blue paint

Therefore, ratio is

$Red : blue = 3\frac{1}{3} : 1\frac{1}{3}\\\\Red : blue = \frac{10}{3} : \frac{4}{3}$

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Let "x" be the cups of red paint needed

Then we get,

$\frac{10}{3} : \frac{4}{3}\\\\x : 1$

This forms a proportion

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Let "x" be the cups of blue paint needed

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$\frac{10}{3} : \frac{4}{3}\\\\1 : x$

This forms a proportion

$\frac{10}{3} \times x = \frac{4}{3} \times 1\\\\x = \frac{4}{10}$

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<h3><u>For every 4 cups of red paint,___ cups of blue paint are needed</u></h3>

Let "x" be the cups of blue paint needed

Then, we get

$\frac{10}{3} : \frac{4}{3}\\\\4 : x$

This forms a proportion

$\frac{10}{3} \times x = \frac{4}{3} \times 4\\\\x = \frac{16}{10}$

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3 years ago

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Answer:

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General Formulas and Concepts:

<u>Pre-Alg</u>

Order of Operations: BPEMDAS
Equality Properties

Step-by-step explanation:

<u>Step 1: Define equation</u>

18/13 = 3/4x

<u>Step 2: Solve for </u><em><u>x</u></em>

Divide both sides by 3/4: x = 24/13

<u>Step 3: Check</u>

<em>Plug in x to verify it's a solution.</em>

Substitute: 18/13 = 3/4(24/13)
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Answer:

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Apply exponent rule: $\frac{x^a}{x^b}=\frac{1}{x^{b-a}}$

Thus, $\frac{12}{d^{14-8}}$

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