SOLUTION: Ruben has scores of 59, 74, and 86 on her tests so far, with one test to go. In order to pass the course, he needs an average of 77. What grade does he need to pass the class?

Algebra ->  Average -> SOLUTION: Ruben has scores of 59, 74, and 86 on her tests so far, with one test to go. In order to pass the course, he needs an average of 77. What grade does he need to pass the class?      Log On


   

Question 310507: Ruben has scores of 59, 74, and 86 on her tests so far, with one test to go. In order to pass the course, he needs an average of 77. What grade does he need to pass the class?
Answer by JBarnum(2146) About Me  (Show Source):
You can put this solution on YOUR website!
%2859%2B74%2B86%2Bx%29%2F4=77 add
%28219%2Bx%29%2F4=77multiply by 4
%28219%2Bx%29=308 subtract 219
x=89