write and solve an inequality. on a trip from virginia to florida, the sampson family wants to travel at least 420 miles in 8 hours. what must be their average rate of speed?

Answer 1

rate = distance / time
= 420/8 = 52.5 mph
so any speed greater than that will give a distance greater than 420

so
rate ≥ 420/8 would do it.

Answer 2

8x ≥ 420
8x/8 ≥ 420/8
x ≥ 52.5

They would need to travel greater than or equal to 52.5 mpg to meet their expectations.