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White raven [17]
3 years ago
15

The sum of three times a number and 12 is twenty

Mathematics
1 answer:
galina1969 [7]3 years ago
3 0
So,

"The sum of three times a number"
3n +

"and 12"
3n + 12

"is 20"
3n + 12 = 20

Subtract 12 from both sides.
3n = 8

Divide both sides by 3.
n =  \frac{8}{3} \ or\ 2 \frac{2}{3}
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Caroline, Colin &amp; Sarah share some money.
Alex787 [66]

Caroline, Colin & Sarah share some money.Caroline will get \dfrac{2}{3}  when Caroline, Colin & Sarah share some money.

<h3>What is the ratio?</h3>

The ratio defined as the sharing of the two or three things or it represent that one thing or number is how many times to the other.

One part is excluded in the problem. That part is:

"Caroline gets \dfrac{1}{9} of the money."

If Caroline gets 1/9th, then remaining is:

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8/9th in 4 parts means, each part is:

\dfrac{\dfrac{8}{9}}{4}=\dfrac{2}{9}

We know Colin gets "3" parts of the total, each part is (2/9)th, so 3 parts would be:

3\times \dfrac{2}{9}=\dfrac{6}{9}=\dfrac{2}{3}

Colin gets  \dfrac{2}{3} money when three of them share money.

To know more about Ratio follow

brainly.com/question/2328454

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8 0
2 years ago
3.
-Dominant- [34]

Answer:

G. 78.5 / π

{ i hope this helps :) i'm sorry if its wrong }

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3 years ago
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your answer is option d

<h2><em>HOPE IT HELPS YOU OUT PLEASE MARK IT AS BRAINLIEST AND FOLLOW ME PROMISE YOU TO FOLLOW BACK ON BRAINLY.IN</em></h2>
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