Elementary Algebra Question

Algebra
Tutor: None Selected Time limit: 1 Day

To earn a “B” in a mathematics course your average score must be at least 80. If you earn a 70, 75 and 82 on the first three exams, what must you score on the 4th exam to earn a “B”?

May 16th, 2015

A good way to do these sort of problems is to think backwards. So you need an average of 80 for all four of your tests. So all you need to do is multiply 80 by 4 to get 320 and subtract the three test scores. So 320 - 70 - 75 - 82 = 93. So the next score would be 93. Hope this helps

May 16th, 2015

Are you studying on the go? Check out our FREE app and post questions on the fly!
Download on the
App Store
...
May 16th, 2015
...
May 16th, 2015
Dec 11th, 2016
check_circle
Mark as Final Answer
check_circle
Unmark as Final Answer
check_circle
Final Answer

Secure Information

Content will be erased after question is completed.

check_circle
Final Answer