Question

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 1

D: 5(x-5) = 353 + x.

Explanation:

n this equation, x represents the score on the fifth test. We subtract 5 from x because the score is five points lower. The right side of the equation represents the average of all five tests, which is 353.

Therefore, Markus could use the equation 5(x-5) = 353 + x to determine the score of his fifth test.