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sertanlavr [38]
3 years ago
13

The average of two numbers is 25 and their difference is 8. What are the numbers?

Mathematics
1 answer:
nika2105 [10]3 years ago
8 0
x;y-the\ numbers\\\\  \left\{\begin{array}{ccc}\frac{x+y}{2}=25&|multiply\ both\ sides\ by\ 2\\x-y=8\end{array}\right\\+\left\{\begin{array}{ccc}x+y=50\\x-y=8\end{array}\right\ \ \ |add\ sides\ of\ the\ equations\\---------\\.\ \ \ \ \ \ \ \ 2x=58\ \ \ \ \ \ \ |divide\ both\ sides\ by\ 2\\.\ \ \ \ \ \ \ \ \ \ x=29\\\\29+y=50\\y=50-29\\y=21\\\\Answer:29\ and\ 21.
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C can really be anything since it's being multiplied by 0 no matter what you put there it will be 0.

But for D it's 1/10^2

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4 0
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3 years ago
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