Question

5. To pass a course with an A grade a student must have an average of 90 or greater. A​ student's grades on three tests are 83,96, and 85 Find what score the student must get on the next test to get an A average What grade must the student get? blank or greater

Answer 1

x ≥ 96

Explanation:

Let x be the fourth score

To find the average add up all the scores and divide by 4

We want to score to be 90 or higher

( 83+96+85+x) /4≥ 90

Multiply both sides by 4

( 83+96+85+x) /4 *4≥ 90*4

( 83+96+85+x) ≥ 360

Combine like terms

x+264 ≥360

Subtract 264 from each side

x+264-264 ≥360 -264

x ≥ 96

The student needs a 96 or greater.