Which pair of angles must be supplementary so that r is parallel to s?

Step-by-step explanation:

There are lots of angles that you could use.

1 and 4

2 and 3

13 and 14

12 and 5

There are others.

5 and 6 will work. 5 is acute. 6 is obtuse. If r and s are meant to be parallel then those angles are the only ones that speak of r and s. The others will make p and q parallel.

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign

the line of