Question

A pharmacy claims the average medication cost $32 but it could differ as much as $8. Write and solve an absolute value inequality to determine the range of medication costs at this pharmacy.

Answer 1

So,

We can tell that the most expensive medication costs $40 and the cheapest costs $24. Thus, only options A and C are left. To see which inequality is true, test a value, such as $30, in the equation in option C.

|30 - 32| ≤ 8

|-2| ≤ 8

2 ≤ 8

Hope this helps! :)