Solve the system of equations. \begin{aligned} &-9y+4x - 20=0 &-7y+16x-80=0 \end{aligned} −9y+4x−20=0 −7y+16x−80=0

(5 , 0)

Step-by-step explanation:

7 * (−9y+4x−20)=0

9 * (−7y+16x−80)=0

-63y + 28x -140 = 0 a

-63y + 144x -720 = 0 b

b-a:  116x - 580 = 0

116x = 580

x = 5

y = (4x-20)/-9 = 0/-9 = 0

f(2x−x2)=−3x2+6x−1

step-by-step explanation:

set up the composite function and evaluate.

f(2x−x2)=−3x2+6x−1

answer: you need to organize this better it does not make sense.

step-by-step explanation: ?