Question 1107476: Markus scored 85, 92, 82, and 94 on the first four tests of the semester. His teacher has not yet told him his score on his fifth test, but did tell him that his score on the fifth test is five points lower than the average (arithmetic mean) of all five tests. Which equation could Markus use to determine the score of the fifth test, x?
Answer by ankor@dixie-net.com(22740)   (Show Source):
You can put this solution on YOUR website! Markus scored 85, 92, 82, and 94 on the first four tests of the semester.
His teacher has not yet told him his score on his fifth test, but did tell him that his score on the fifth test is five points lower than the average (arithmetic mean) of all five tests.
Which equation could Markus use to determine the score of the fifth test, x?
:
Find the sum of the first 4 tests
85+92+82+94 = 353
The equation
 - x = 5
:
:
I got x = 82
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