Colin is saving money to buy art supplies that cost $45. If he saves 15% of the money he needs how much more does he have to save? Explain your reasoning.

Let r = 3. what is the value of r + 58?

F(x)= 1/x-4, g(x)=4x+1/x a. use composition to prove whether or not the functions are inverses of each other. b. express the domain of the compositions using interval notation.

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?