2 years ago

PLEASEEEEEEEEEEEEEEEEEE HELP!!!!!!!!!

Mathematics

1 answer:

rewona [7]2 years ago

5 0

Answer:

12 Squared Units

Step-by-step explanation:

Top length: 4 Units

Side length: 3 Units

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8 - 2x + 4 + 8x – 21

RoseWind [281]

Answer: 6x -9

Step-by-step explanation:

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2 years ago

Read 2 more answers

The average of 8 scores is Q. If the average of 3 of the scores is Z, what is the average of the other 5 scores?

OLga [1]

$\dfrac{s_1+\cdots+s_8}{8}=Q\implies s_1+\cdots+s_8=8Q$
$\dfrac{s_1+s_2+s_3}{3}=Z\implies s_1+s_2+s_3=3Z$

Substituting into the first equation, this means

$s_4+\cdots+s_8=8Q-3Z$

Divide by 5 to get the average:

$\dfrac{s_4+\cdots+s_8}{5}=\dfrac{8Q-3Z}5$