4 years ago

What is the answer when subtracting (-3y2-8)-(5y2+1)?

Mathematics

1 answer:

Alona [7]4 years ago

3 0

You have to distribute the minus sign to the second parenthesis, changing the sign of every term:

$-3y^2-8-(5y^2+1) = -3y^2-8-5y^2-1 = -8y^2-9$

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Koby can work about 22 math problems in 30 minutes. At this rate, how many math problems can Koby work in 3 hours? A) 36 B) 66 C

zvonat [6]

Hi Lania!

If Koby can work 22 math problems in 30 minutes, then he can work 44 in an hour (multiply your problems completed and time elapsed by 2).
Now, we have to figure out how many he can complete in 3 hours, so all we have to do is multiply our current math problems by 3.

44 * 3 = 132

This means that Koby can complete D.) 132 math problems in 3 hours.
I hope this helps!

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3 years ago

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Answer:

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