SOLUTION: The average, or mean, T, of three exam grades, s, x, and y, is given by the following formula. T=s+x+y/3 solve for y use the formula in part (a) to solve this problem. on your

Question 789959: The average, or mean, T, of three exam grades, s, x, and y, is given by the following formula.
T=s+x+y/3
solve for y
use the formula in part (a) to solve this problem. on your first two exams your grades are 85% and 87%; s=85 and x=87. what must you get on your third exam to have an average of 86%?
A. the formula is y=?
b. the answer is ?%
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
This is a matter of writing the formula correctly and substituting the given values; or solving for the unknown value and then substituting the given values.

Now substitute the given values.
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