Question

jackie scored 82 and 88 on her first two quizzes. write and solve a compound inequality to find the possible values for a third quiz score that would give her an average between 80 and 85, inclusive.

Answer 1

Answer:

compound inequality: 80 ≤ (82 +88 +q)/3 ≤ 85

solution: 70 ≤ q ≤ 85

Step-by-step explanation:

Let q represent Jackie's final quiz score. To achieve her desired average, q must satisfy ...

... 80 ≤ (82 +88 +q)/3 ≤ 85

We can multiply by 3, then subtract the constant in the middle.

... 240 ≤ 170 +q ≤ 255

... 70 ≤ q ≤ 85