SOLUTION: A student's grade in a course is the average of 4 test grades and a final exam that is worth three times as much as each test. Suppose a student has test grades of 91, 89, 80, and

Algebra ->  Average -> SOLUTION: A student's grade in a course is the average of 4 test grades and a final exam that is worth three times as much as each test. Suppose a student has test grades of 91, 89, 80, and       Log On


   

Question 827283: A student's grade in a course is the average of 4 test grades and a final exam that is worth three times as much as each test. Suppose a student has test grades of 91, 89, 80, and 93. Write an equation to model this situation where xis the student's grade on the final exam and yis the student's average for the course.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
The score, x, for the final examination is worth three normal tests, so
%2891%2B89%2B80%2B93%2Bx%2Bx%2Bx%29%2F7
%2891%2B89%2B80%2B93%2B3x%29%2F7, the student's course average.