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bekas [8.4K]
3 years ago
11

12 of a number b increased by 7

Mathematics
1 answer:
Lilit [14]3 years ago
7 0

Answer:

12b+7

Step-by-step explanation:

there's 12 of b and it increases by 7

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20% of the participants are girls and got a medal, and 33% of the girls got a medal.

<h3>What percent of the participants were girls who received medal?​</h3>

First, we know that 40% of the participants were boys, so the other 60% were girls.

We know that 50% of the boys got a medal, so the percentage (in decimal form) of participants that are boys and got a medal is:

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So, 20% of the participants are boys and got a medal.

We know that the number of girls that got a medal is the same as the number of boys, then we also have that 20% of the participants are women who got a medal.

Then if the percentage of girls that got a medal is x (in decimal form), we must have that:

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If you want to learn more about percentages:

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