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Novosadov [1.4K]
2 years ago
11

(a) 88.83 is what percent of 21? (b) 25.83 is 52.5% of what number? Thanks!!!

Mathematics
1 answer:
amm18122 years ago
3 0
A is 4.23% of 21
B is 0.492
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Answer:

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Step-by-step explanation:

Let s represent the son's age now. Then s+32 is the father's age. In 4 years, we have ...

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  5s +20 = s +36 . . . . . eliminate parentheses

  4s = 16 . . . . . . . . . . . . subtract s+20

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The son is now 4 years old; the father, 36.

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<em>Alternate solution</em>

In 4 years, the ratio of ages is ...

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The difference of their ages at that time is 5-1 = 4 "ratio units". Since the difference in ages is 32 years, each ratio unit must stand for 32/4 = 8 years. That is, the future age ratio is ...

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