All categories

3 years ago

I have no idea how to solve this. Help would me much appreciated.

Mathematics

1 answer:

Otrada [13]3 years ago

7 0

Answer:

Adam is 9 years old.

Step-by-step explanation:

Let d and c represent Adam's and Alicia's ages.

d = c - 15, and

c + 6 = 2(d + 6)

Rearrange d = c - 15 as c = d + 15, and then substitute d + 15 for c in the second equation. We obtain:

d + 15 + 6 = 2(d + 6), or

d + 21 = 2d + 12

Combining like terms, we get 21 = d + 12, or 9 = d.

If d = 9 then c = d + 15, or c = 9 + 15, or c = 24.

Adam is 9 years old.

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2 years ago

-(-9)_l-9l is it grater than or less than or eqaul to?

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Answer:

Equal to

Step-by-step explanation:

Hello!

Let's simplify the left side:

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Remember that the negative sign also means opposite, so the opposite of negative 9 is positive 9.

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Remember that in an absolute value bracket, any positive value stays positive, but any negative value turns to the positive value.

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2 years ago

Read 2 more answers

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3 years ago

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