Which expression is equivalent to (9x^2+2x-7)(x-4) A). x(9x^2+2x-7)-4
B). -4x(9x^2+2x-7)
C). (9x^2+2x-7)(x)+(9x^2+2x-7)(-4)
D). x(9x^2+2x-7)+4(9x^2+2x-7)

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?