SOLUTION: Sam has scores of 60,55,65,75 on his first four algebra exams. What must he earn on the fifth exam to receive a grade of 70% or higher at the end of the semester?

Algebra ->  Average -> SOLUTION: Sam has scores of 60,55,65,75 on his first four algebra exams. What must he earn on the fifth exam to receive a grade of 70% or higher at the end of the semester?      Log On


   



Question 1111655: Sam has scores of 60,55,65,75 on his first four algebra exams. What must he earn on the fifth exam to receive a grade of 70% or higher at the end of the semester?
Found 2 solutions by Alan3354, math_helper:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Sam has scores of 60,55,65,75 on his first four algebra exams. What must he earn on the fifth exam to receive a grade of 70% or higher at the end of the semester?
--------------
To average 70, (60+55+65+75 + S)/5 = 70 --- S = Score
255 + S = 350
S = 95

Answer by math_helper(2461) About Me  (Show Source):
You can put this solution on YOUR website!
Sam is going to step it up in order to elevate his average to a 70%:
+%2860%2B55%2B65%2B75+%2B+x%29+%2F+5+%3E=+70+
+%28255+%2B+x%29+%3E=+350+
++highlight%28matrix%281%2C3%2C+%22++%22%2C++x++%3E=+95++%2C+%22%25+%22%29+%29++