SOLUTION: your test average is a 78 after 5 tests. What must you score on the 6th test to bring your average up to an 80?
Algebra.Com
Question 755410: your test average is a 78 after 5 tests. What must you score on the 6th test to bring your average up to an 80?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
your test average is a 78 after 5 tests. What must you score on the 6th test to bring your average up to an 80?
------
Equation:
(5*78+x)/6 = 80
390 + x = 480
x = 90
============
Cheers,
Stan H.
=============
RELATED QUESTIONS
Martin's average score after 4 tests is 89. What score on the 5th test would bring... (answered by stanbon)
Lenny's average score after 3 tests is 88. What score on the 4th test would bring Lenny's (answered by ReadingBoosters)
(3.) The average of your first three test grades is 78. What grade must you get on your... (answered by Earlsdon)
Seth scored an 82%, 88%, and 75% on three tests. What score must he get on the fourth... (answered by addingup)
Seth scored an 82%, 88%, and 75% on three tests. What score must he get on the fourth... (answered by greenestamps)
An average of 80 is needed to obtain a grade of B in this course.
Suppose your grades... (answered by richard1234)
To get a B in a course, you need an average of 80% or better on four tests that are worth (answered by ewatrrr)
You earned the following marks (all equally weighted) on your first five tests:... (answered by stanbon)
Tom has taken 5 of the 8 equally weighted tests in his U.S. History class this semester,... (answered by drk,stanbon)