book Maths Puzzle Numerical Ability

A motorcycle breaks down and the rider has to walk the rest of the way to work. The motorcycle was traveling at 45 mi/h, and the rider walks at a speed of 6 mi/h. The distance fro

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Please help me solve this problem:

If Car A were traveling at 40 miles per hour and Car B was traveling 150 feet behind Car A at 45 miles per hour, how many seconds will it take before Car B runs into Car A? My question says to solve the system of this inequalitie by graphing.
Y>/X+1/
(the > has a line underneath of it.) ( / means the lines that go straight up and down.)

I d