-4 = r/20 -5
Solve for r. Show your steps

Use the x-intercept method to find all real solutions of the equation.x^3-10x^2+27x-18=0

Let f(x) = x+3 and g(x) = 1/x the graph of (fog)(x) is shown below what is the range of (fog)(x)?

Four congruent circular holes with a diameter of 2 in. were punches out of a piece of paper. what is the area of the paper that is left ? use 3.14 for pi