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3 years ago

12

The sister is as old as the brother will be when the sister is twice as old as the brother was when the sister' age was half the

sum of their present age

1 answer:

Colt1911 [192]3 years ago

8 0

If the sister is 20 now, the brother is 10. do you understand?

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3 years ago

Of 450 college students, 110 are enrolled in math, 205 are enrolled in English, and 50 are enrolled in both. If a student is sel

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Answer:

Step-by-step explanation:

Given that Of 450 college students, 110 are enrolled in math, 205 are enrolled in English, and 50 are enrolled in both. If a student is selected at random

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(b) The student is enrolled in English.= $\frac{205}{450} =0.456\\$

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(e) The student is enrolled in English but not in mathematics.

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3 years ago

Which expression is equal to (−4x2−1)(2x2+3)?

Leya [2.2K]

Answer:

The first one:

−8x4−14x2−3

Step-by-step explanation:

(-4•2-1)(2•2+3)

-4•2 = -8

-8 - 1 = -9

(-9)(2•2+3)

2•2 = 4

4+3 = 7

(-9)(7) = -63

Now we find the one that equals -63:

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(-8•4)-14•2-3

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-32-(14•2)-3

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(-32-28)-3

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BAM! THE ANSWER!

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