document.write( "Question 954543: Jason has grades of 89 and 87 .what grades must he earn on his next test to get an average of 90 for the three tests
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Algebra.Com's Answer #582977 by macston(5194)\"\" \"About 
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To average 90 on three tests, the sum of the grades must be 3(90)=270
\n" ); document.write( "The sum of 89 and 87 is 176 so to average 90, he must score 270-176=94
\n" ); document.write( "ANSWER: He must score 94 on the third test to average 90 on the three tests.
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