Since you know that the figure is a parallelogram due to the fact that RS and QP are congruent, and that PS and QR are congruent, you know that each of the diagonals bisect each other therefore meaning 2x=y+3 and x+2=y
Solve the system to get x = 5 and y = 7.
Then you can plug the values back in to find that the values work out
Probability of raining=0.45 Probability of not raining=1-0.45=0.55 The expected earning will be given by: E(x)=240(0.55)+320(0.45) E(x)=132+144 E(x)=276
