7. Find m<A. help please

20

Step-by-step explanation:

B is 60 because of corresponding angles.

A & B must be 180

so If B is 60 and 100 is given, then A must be 20.

kk.bj.

step-by-step explanation:

.mnm.kn.kj

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10