Question 96548
Heather recieved grades of 80, 75, and 86 on three algebra tests.  What must her grades be on the next test if her average for the four tests is to be at least 82.. 
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EQUATION:
Let the grade on the fourth test be "x".
(80+75+86+x)/4 >= 82
241+x >= 4*82
241+x >= 328
x >= 87
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Cheers,
Stan H.