SOLUTION: If Joe gets 97 on his next math test, his average will be 90. If he gets 73, his average will be 87. How many tests has Joe already taken?
Formula: T+97 = 90, T+73 = 87
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Question 546758: If Joe gets 97 on his next math test, his average will be 90. If he gets 73, his average will be 87. How many tests has Joe already taken?
Formula: T+97 = 90, T+73 = 87
n+1 n+1
Answer by JBarnum(2146) (Show Source): You can put this solution on YOUR website!
solve above for T
use substitution below
use substitution below
check
correct
check
correct
he has already taken 7 tests
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