Answer:
First answer: The sum of the two angles equals 70 degrees.
Second answer: The complimentary angle is 45.6, and the supplementary angle is 135.6.
I hope this helps! :)
Define variable- 4.5x
Equation - 15+ 4.5x =42
Solution- x=6
15+ 4.5x =42
4.5x = 27
X=6
Hello James!
Graph using the slope and y - intercept.
Slope:

Y-intercept: -3
The graph looks like this ↓↓↓