Find the sum of 7x^2 + 3 and 4x^2 -5?

The radius of the base of a cylinder is 10 centimeters, and its height is 20 centimeters. a cone is used to fill the cylinder with water. the radius of the cone's base is 5 centimeters, and its height is 10 centimeters.

In what form is the following linear equation written y=9x+2

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left