Evaluate the expression 4-7i/7+4i

The function ƒ is defined by ƒ(x) = (x + 3)(x + 1). the graph of ƒ in the xy-plane is a parabola. which interval contains the x-coordinate of the vertex of the graph of ƒ?

Consider the function f(x)=-5x+3 what is f(-2)

The amount of data left on the cell phone six gb for 81.5 gb of data is used how much data is available at the beginning of the cycle