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In three math tests, you have scored 91, 95, and 88 points. You want to have an average score of at least 90 points after four tests. What expression would you use to find the minimum score on the fourth test? What is the minimum score?

Question #16a00

How do you simplify #\frac {  2 ( 6) } { 6 8} #?

Question #bd688

How do you solve this system of equations: #3x + 5y = 19 and 4x  y = 10#?