Question
Mallory had an average of 87 on her first three algebra quizzes. She made the same score on the first two quizzes and 9 points higher on the third quiz. What was her grade on each quiz?
Answers
PsyDAG
mean = sum of scores/number of scores
Let x = score on first two quizzes
87 = (2x + x+9)/3
Solve for x, then x+9.
Let x = score on first two quizzes
87 = (2x + x+9)/3
Solve for x, then x+9.
Taylor
It worked, thanks!
PsyDAG
You are welcome.