SOLUTION: After taking 5 quizzes your average is 72 out of 100. What must your average score be on the next 5 quizzes to increase your average to 79. Write an equation and solve.\ Please ex

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Question 981895: After taking 5 quizzes your average is 72 out of 100. What must your average score be on the next 5 quizzes to increase your average to 79. Write an equation and solve.\
Please explain how to do this
Thank you.
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
First five quizzes,
%28A%2BB%2BC%2BD%2BE%29%2F5=72
So,
A%2BB%2BC%2BD%2BE=360
So with five more quizzes, the average becomes,
%28A%2BB%2BC%2BD%2BE%2BF%2BG%2BH%2BI%2BJ%29%2F10=79
360%2BF%2BG%2BH%2BI%2BJ=790
F%2BG%2BH%2BI%2BJ=430
Dividing by 5,
%28F%2BG%2BH%2BI%2BJ%29%2F5=86
So you have to average an 86 for the next five quizzes.