Andrew is creating a rectangular dog run in his back yard. The length of the dog is 18 feet. The perimeter of the dog run must be at least 42 feet and no more than 72 feetUse a compound inequality to find the range of values for the width of the dog run Use when writing your inequality
42 ≤ 2(w+18) ≤ 72
21 ≤ w+18 ≤ 36
3 ≤ w ≤ 18