Solve the problem by setting up and solving an appropriate inequality. Chris has scores of 88, 90, and 76 on his first three algebra tests. What score must he get on the fourth test to have an average of 85 or higher for the four tests?
A) $x \geq 86$
B) $x \leq 83$
C) $x \leq 86$
D) $x \geq 83$

Question

Quizplus · Accepted Answer

Let x be the score Chris must get on the fourth test. We know that the average of the four tests must be 85 or higher, so we can write the following inequality:
$$\frac{88+90+76+x}{4} \geq 85$$
Simplifying this inequality, we get:
$$x \geq 86$$
Therefore, Chris must get a score of 86 or higher on the fourth test to have an average of 85 or higher for the four tests. The correct choice is option A.

Solve the Problem by Setting Up and Solving an Appropriate x≥86x \geq 86x≥86

Solve the Problem by Setting Up and Solving an Appropriate $x \geq 86$