Question

A car traveling on Interstate 55 travels 120 miles in one and a half hours. What is

the cars speed in miles per hour? *
need help

Answer 1

You don't need help. You know the formula: Distance = (speed) x (time)

The formula is always true, for any distance, speed, and time.

Plug in the numbers you know: 120 miles = (speed) x (1.5 hours)

Divide each side by "1.5 hours": (120 mi / 1.5 hr) = speed

Doo-da division: 120/1.5 mi/hr = speed

Clean it up: 80 miles/hour = speed