SOLUTION: On the first four tests of the term ur average is 84% u think u can score 96% on each of the remaining tests. How many consecutive test scores of 96% would u need to bring ur ave

Question 851366:
On the first four tests of the term ur average is 84% u think u can score 96% on each of the remaining tests. How many consecutive test scores of 96% would u need to bring ur average up to a 90% for the term
Answer by checkley79(3341) (Show Source): You can put this solution on YOUR website!
(4*84+96*X)/(4+X)=90
(336+96X)/(4+X)=90
90(4+X)=336+96X
360+90X=336+96X
90X-96X=336-360
-6X=-24
X=-24/-6
X=4 TESTS OF A GRADE OF 96 IS NEEDED.
PROOF:
(4*84+96*4)/(4+4)=90
(336+384)/8=90
720/8=90
90=90

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