What is the value of f ( − 3a ), if f ( x ) = 2x 2 + 6x ?

select one: a. 18a 2 - 9a
b. 18a 2 - 18a
c. 9a 2 - 18a
d. 18a - 6a

Step-by-step explanation:

is it 35

step-by-step explanation:

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