20 points pl ∠4=? a. 120 degrees b. 50 degrees c. 30 degrees d. 150 degrees ∠6= a. 150 degrees b. 130 degrees c. 15 degrees d. 30 degrees ∠8= a. 30 degrees b. 132 degrees c. 20 degrees d. 150 degrees ∠7= a. 130 degrees b. 30 degrees c. 150 degrees d. 15 degrees the last question is in the file the answers for the last question is a. a and c b. b and c c. a and b d. none of the above

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

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.

the olimpics is not going to wokk out

step-by-step explanation: