SOLUTION: what grade did a student receive on test one, if he received a 50, a 70, and a 90 on the other three test znc his test average is a 75 percent?

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Question 276737: what grade did a student receive on test one, if he received a 50, a 70, and a 90 on the other three test znc his test average is a 75 percent?


Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
(X+50+70+90)/4=75
(X+210)/4=75
X+210=75*4
X+210=300
X=300-210
X=90 IS THE GRADE FOR THE FIRST TEST CORE.