That is Slope Form. They should give you two coordinates and you substitute them in.
#a
m<5=40°
#b
m<2=140
#c
<5 and <2 are linear pair(looked properly in diagram) Hence they are supplementary.
#d
<5 and 2 are same side interior angles (Clearly shown on diagram .
- We can call them co responding interior angles and their sum will be 180 if lines are parallel
#e
a||b
Let's verify
Let the angle below <1 be <3
Now
<2+<3=180
<5+<4=180

Hence verified
Answer:
1 over 8
1
8
=0.125
Step-by-step explanation:
23958
29538
25398
25938
29358
23598
I think this is what you meant.
Answer:
-10y
Step-by-step explanation:
=5x-5y-5y-5x
=5x-5x-5y-5y
=-10y