Let us use the formula with the point (4,5) and (0,2)
20 2/3 hrs or 20 hours and 40 minutes cleaning his room. There are 30 months in may, so you multiply this by 2/3 to get 20 2/3 hrs
These are congruent angles. So they would be equal to each other. 6x=4x+50
2x=50
x=25°
:)