True or false: If f and g are functions, then (f o g)(x) is always equal to (g o f)(x)?

Which shows one way to determine the factors of  x3  +  5x2  –  6x  –  30 by grouping? x(x2  –  5)  +  6(x2  –  5)x(x2  +  5)  –  6(x2  +  5)x2(x  –  5)  +  6(x  –  5)x2(x  +  5)  –  6(x  +  5)

Find an equation of the line perpendicular to the graph.

Do,h = (7, 9) (14, 18) the scale factor is