Answer:

Step-by-step explanation:
In any circle the following ratios are equal
= 
=
= 
The answer is 135 degrees as 45 add 135 equals 180 degrees as it's a straight line
Answer:
It's y=4x+3
Step-by-step explanation:
if you find the slope m=(y2-y1)/(x2-x1). Then you know the y-intercept is 3 because it gives you the point (0,3).
The answer is a all of the points
-infinity, positive infinity