townsendkorieotk4d4 townsendkorieotk4d4
  • 23-07-2017
  • Mathematics
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Paul has grades of 63 and 81 on his first two tests. What must he score on his third test in order to have an average of at least 70

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solomayaschwabotk3vx solomayaschwabotk3vx
  • 23-07-2017
To get an average of at least a 70, Paul would have to get at least a 66 on his third test.
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irspow
irspow irspow
  • 23-07-2017
(60+81+s)/3≥70  multiply both sides by 3

60+81+s≥210  combine like terms on left side

141+s≥210  subtract 141 from both sides

s≥69

So Paul will have to score 69 or more on his next test in order to have an average of at least 70.

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