Equation of line with slope of -2 and passes 2,1

Which functions shave a maximum and are transformed to the left and down of the parent function ,check all that apply f(x) = x2? p(x) =14 (x+7)2 + 1

Nine more than four times a number is the same as one less than twice the number. find the number?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15