Posted by **sasha** on Thursday, October 18, 2007 at 9:01pm.

a student wants to get an average of 80 on the 5 tests to earn an A grade.on the 4 test he gets 79, 88,64,78. how much should he score on the 5th test so that he gets this average of 80?

- math ( average) -
**Reiny**, Thursday, October 18, 2007 at 9:10pm
(79+88+64+78+newtest)/5 = 80

solve for "newtest"

- math ( average) -
**sasha**, Thursday, October 18, 2007 at 9:18pm
still don't get it

- math ( average) -
**Ms. Sue**, Thursday, October 18, 2007 at 9:53pm
Check my answer below.

- math ( average) -
**Emily**, Thursday, October 18, 2007 at 9:11pm
Let's say the score of the 5th test her is x. To get an average of something, you add everything up and divide by the number of numbers (in this case, tests), right? So, this is how you would set this one up:

79+88+64+78+x

------------- = 80

5

Can you solve the rest?

- math ( average) -
**Ms. Sue**, Thursday, October 18, 2007 at 9:13pm
The student needs a total of 400 points on 5 tests to get an average of 80.

He has a total of 309 on the first four tests. What score does he need on the fifth test to bring his total up to 400?

- math ( average) -
**Anonymous**, Friday, January 20, 2012 at 3:38pm
91

- math ( average) -
**Jeremiah**, Wednesday, July 17, 2013 at 10:02pm
What is the next step after adding and dividing?

## Answer This Question

## Related Questions

- Math - In math class, a student has an average grade of 85% for five tests so ...
- math - A math teacher calculates grades as follows:Grade=[2 test averages+quiz ...
- Math - After 4 tests, Amanda's average score was 88. What score must she earn on...
- Algebra 1 - In order to earn an A in a class, your test scores must average at ...
- Math 208 - Grade Average A student scores 65 and 82 on two different 100-point ...
- programming - Professor Merlin has asked you to help him. He has 5 students who ...
- Computer Programing & Logic Design - Submit pseudocode and a flowchart for the ...
- Math - In your class, you have scores of 73,85,76, and 92 on the first ...
- java programming - Test Average and Grade Write a program that asks the user to ...
- Math - Karl's scores on the first five science tests are shown in the table. ...

More Related Questions