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

a. 80 < = 82 + 88 + n / 3 < = 85; 70 < = n < = 85

b. 70 < = 82 + 88 + n / 3 < = 85; 80 < = n < = 85

c. 80 < = 82 + 88 + n / 3 < 85; 70 < n < 85

d. 82 < = 80 + 85 + n / 3 < = 88; 70 < = n < = 85

Answer : option A

Jackie scored 82 and 88 on her first two quizzes

Let n be the score of third quiz

Average of 3 quiz =

average between 80 and 85, inclusive.

so average lies between 80  and 85

Question says 80  and 85 inclusive. so we use <= or >= symbol

So inequality becomes

( multiply all sides by 3)

(subtract all sides by 170)

so option A is correct

1. 22

2. 1

3. 7

4. 18

step-by-step explanation

e2020 got it right

14

step-by-step explanation: