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On an algebra test, the highest grade was 56 pointsmore than the lowest grade. (In statistics, thedifference between the largest number and thesmallest number is known as the range.) The sumof the two grades was 128. What were the highestand lowest grades on the test? |
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Answer» let lowest grade=xhighest = x+56A/Sx+x+56=1282x= 128-56= 72x= 72/2=36so lowest grade=36highest grade= 36+56= 92 |
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