I need help on this math equation.

Question

Noah and Andre are 15 miles apart on a bike path when they start biking toward

each other. Noah rides at a constant speed of 4 miles per hour, and Andre rides at a

constant speed of 2 miles per hour. How long does it take until Noah and Andre

meet?

Answer 1

Hi Kiki,

This problem is asking you to how long it takes for Noah and Andre to meet. Begin by making a chart for distance, rate, and time.

Rate × Time = Distance

Noah 4 x 4x

Andre 2 x 2x

15

Multiply across to get the distance. And then add downward to form the equation. We know there is 15 miles between, and solve. The answer in written form would be "It takes Noah and Andre two and a half hours to meet."

4x+2×=15

6×=15

×=2.5

Double Check 4(2.5)+2(2.5)=15