Question 210199
Your quiz grades are 73,75,89,and 91. What is the lowest grade you can obtain on the last quiz and still achieve an average of at least 85?
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Let the grade you need be "x":
Equation:
The average of the 5 grades must be 85:
73+75+89+91+x = 5*85
x = 425-(73+75+89+91)
x = 97 (Lowest grade on last quiz to achieve 
an average of at least 85)
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Cheers,
Stan H.