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ASHA 777 [7]
3 years ago
12

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?

Mathematics
1 answer:
OLga [1]3 years ago
7 0
\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
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Graph 1: Consistent Dependent

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Step-by-step explanation:

Consistent means they have at least one solution.  So lines that intersect once or lines that intersect infinitely many times are both consistent systems.

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3 years ago
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Step-by-step explanation:

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