Brightstorm Q & A : Bill has taken 3 math tests. Find the score Bill needs on the next test in order to have an 80 average. Test 1: 78 Test 2: 78 Test 3: 38

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lqez now

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Bill needs a 126 on his next test to have an 80 average: 78+78+38+126=320 320/4= 80

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Minji August 19, 2010

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80 x 4 = 320 78 + 78 + 38 = 194 320 - 194 = 126 78 + 78 + 38 + 126 = 320 320/4 = 80

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student_ofournine August 27, 2010

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