SOLUTION: please help me with this word problem On her last two math tests, Leah had scores of 83 and 92. What must Leah score on the next test to average at least a 90 on all three tests

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Question 775795: please help me with this word problem
On her last two math tests, Leah had scores of 83 and 92. What must Leah score on the next test to average at least a 90 on all three tests?

Answer by sofiyac(983)   (Show Source): You can put this solution on YOUR website!
let the next test have score of x then average means you add them all up, divide by 3 and that equals the average
solve for x, multiply both sides by 3 to get rid of the fraction
83+92+x=270
175+x=270 subtract 175 from each side
x=95

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