What is the value of -2x2 + 8x when x = -6?

- 120

Step-by-step explanation:

-2 x² + 8 x = 0

x = - 6

Substitute x = - 6 into -2 x² + 8 x = 0

- 2 x² + 8 x = 0

- 2 × ( - 6² ) + 8 × ( - 6 ) = 0

( - 2 × 36 )  + ( 8 × -6) = 0

- 72 + ( - 48 ) = - 120

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

answer is the third choice:

3x^5+4x^4+x^3+2x^2-10x-7=0

step-by-step explanation: