X=3y
Y=x+4

I have the answers. I just need help showing my work plz :)

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)

The graph below shows the line of best fit for data collected on the number of cell phones in cell phone cases sold at the local electronic store on four different days

Fracisco's game involves 3 green, 2 yellow, 4 red, and 3 black marbles. if he randomly draws three marbles from the bag, without replacement, what is the probability that he will draw yellow, and then red, and then black? a)1/192 b)1/72 c)3/220 d)1/55