Q3 The first side of a triangle is 3 times as long as the third side. The third side is five feet shorter than twice the length of the second side. If the perimeter of the triangle is 52 feet, what is the length of the first side?

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Bring the fraction a/a-4 to a denominator of 16-a^2

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?