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FrozenT [24]
3 years ago
9

a girl age is 21 year old and her brother is a third her age.When the girl is 36,what will be the age of her brother?

Mathematics
2 answers:
umka2103 [35]3 years ago
3 0
Her brother is 7 years old at the moment. He will be 21 when his sister is 36.
Dmitry [639]3 years ago
3 0
I hope this helps you



brothers age 3.?=21 ?=7



when girl 36


now she is 21

36=21+15 it's have to past 15 years


15 years later brothers age


7+15=22


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We can prove this by turning those numbers into fractions:

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Or simply:

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To get the equivalent of 16 to 14; we must multiply both numbers by 4.

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You and your friend play a game. You answer 80% of the questions correctly and your friend answers 0.60 of the questions correct
bezimeni [28]

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5

Step-by-step explanation:

Assuming both players can answer the same question, the minimum number of questions is the smallest number that when multiplied by either 0.60 or 0.80 yields a whole number.

Let x be the number of questions, solving by trial and error:

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3 years ago
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marissa [1.9K]

Answer:

9

Step-by-step explanation:

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For any odd integer, n ; a will have only one real nth root which will be a positive integer.

Similarly, for any integer, n, that is > 1 ; related by the expression ;

p^n = a ; the nth root of a = p

Therefore,

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To obtain the value of p ; take the cube of both sides

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asambeis [7]

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