SOLUTION: after six 100 point tests, you have 552 points. write and solve an equation to find out how many points you need to score on your next 100 point test to have a mean score of 91
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Question 956823: after six 100 point tests, you have 552 points. write and solve an equation to find out how many points you need to score on your next 100 point test to have a mean score of 91 Answer by checkley77(12844) (Show Source):
You can put this solution on YOUR website! (552+X)/(7*100)=.91
.91*700=552+X
637=552+X
X=637-552
X=85 IS THE NECESSARY GRADE FOR THE NEXT TEST.
PROOF:
(552+85)/700=.91
637/700=.91
.91=.91
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