exam Maths Puzzle Numerical Ability

The length of a rectangle is 4 less than 3 times the width. If the perimeter is 40, find the dimensions of the rectangle.
I really need help!!

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exam Other Question

i did this problem i just want to see if i did it right..

what is the domain?

7-X/5x^2-18x-8

thanks for your help

angela In a car race, Car A starts 1 mile behind Car B. Car A is traveling 65 miles per hour, while Car B is traveling at 55 miles per hour. How long will it take for Car A to overtake Car B.