Answer:
x=45
Step-by-step explanation:
Angles on a line equal 180
2x+90=180
Subtract 90 on both sides
2x=90
Divide by 2 on both sides
x= 45
Answer:
0
Step-by-step explanation:
Line is parallel to the x-axis,
Therefore slope = 0
(Any line which is parallel to the x-axis has zero slope)