Given f(x)=x-1 and g(x)=-x+1, find (f•g)(x)

What is x and y (use substitution? ) 5x+3y=38 and y=3x+8?

An an average person has 6×10 by the power of two as many red blood cells as white blood cells a small sample of the blood has 7×10 by the power of three white blood cells about how many red blood cells are in the sample

What is the solution of the systems of equations? y=2/3x+3 x=-2