The equation for the line is Y=5/2x-2
Supplementary angle: x + y = 180
180 - 16.6 = 163.4
The first angle would be 163.4 and the second angle would have to be 16.6
Hope this helped :)
Answer:
4 hours
Step-by-step explanation:

21 · y = 3 · 28
21y = 84
21y ÷ 21 = 84 ÷ 21
y = 4