-7+9y=-19 4x-9y=10 pls help like rn fr

9y=-19+7

y=-19/9+7/9

4x-9(-19/9+7/9)=10

4x-9(-4/3)=10

multiply -9 by -4/3 to get 12

4x+12=10

4x=10-12

4x=-2

x=-1/2

if x=-1/2 then y

4(-1/2)-9y=10

-2-9y=10

-9y=12

y=-1/1/3

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:

what is your question that you ask

step-by-step explanation: