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Jim has grades of 84, 65, and 76 on three math tests. What grade must he obtain on the next test to have an average of exactly 80 for the four tests?

Answer :

luana
[tex]x-\ frade\ from\ next\ test\\\\ \frac{84+65+76+x}{4}=80\ \ \ \ | multiply\ by\ 4\\\\ 225+x=320\ \ \ \ | subtract\ 225\\\\ x=95\\\\ He\ should\ have\ 95\ points.[/tex]
the answer would be 95, if you add 95 to the numbers given and divide them by 4 you'll get 80 percent

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