If a + b + c = − 2 a+b+c=−2a, plus, b, plus, c, equals, minus, 2 and x + y = 1 0 x+y=10x, plus, y, equals, 10, what is − 9 a + 2 x − 9 b − 9 c + 2 y −9a+2x−9b−9c+2yminus, 9, a, plus, 2, x, minus, 9, b, minus, 9, c, plus, 2, y?

Sorry but your question makes no sense as posted. Please, post exactly as written in your textbook.

step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation: