Simplify the algebraic expression: 4y + 6x + 5x - 2y

Which represents the inverse of the function f(x) = 4x? h(x) = x + 4 h(x) = x – 4 h(x) = x h(x) = x

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)