1. Yes because of the constant and coefficient if you add it. Like the answer is 5m +4.
A) Divide total miles by total time:
21 miles / 4 hours = 5.25 miles per hour.
B) Divide miles by miles per hour:
42 miles / 5.25 miles per hour = 8 hours.
Answer: 19 ≥ 3z + 1 ≥ - 5
