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Darya [45]
2 years ago
8

Sally has a bunch of pennies in her piggy bank. She gives 1/3 of her pennies to her older brother. Then, she gives 2/5 of her re

maining pennies to her younger sister. After all this, Sally has 24 pennies remaining. How many pennies did Sally start with?
Mathematics
1 answer:
V125BC [204]2 years ago
3 0

She started with 60 pennies

<h3>Ratios and propotions</h3>

Let the number of a bunch of pennies she has to be "x"

If she gives 1/3 of her pennies to her older brother, she will have 2/3 x remaining

If she gives 2/5 of her remaining pennies to her younger sister, she will have 2/3x- (2/5 of 2/3x) =  x remainijg

If Sally has 24 pennies remaining, then;

2/3x - 4/15x = 24

10x-4x/15 = 24

6x/15 = 24

6x = 15 * 24

x = 60

This means that she started with 60 pennies

Learn more on ratios here:

brainly.com/question/2914376

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2 years ago
Dana is buying Grandparents' Day gifts at the mall. She spends $13.75 on a teacup for her grandmother. She spends 4/5 of that on
marysya [2.9K]

The total money Dana spent in all is $24.75

<h3>Ratio and proportions</h3>

Ratio are written as fractions of two integers. For instance a/b.

Amount spent for grandmother = $13.75

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7 0
2 years ago
<img src="https://tex.z-dn.net/?f=f%28x%29%20%3D%20%7Bx%20-%201%7D%5E%7B2%7D%20%20-%204" id="TexFormula1" title="f(x) = {x - 1}^
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