Answer:
8 miles in 1 hour is the answer
Step-by-step explanation:
My math is terrible but I think u should eliminate and substitute.
(7x-5)+(3x-15)=180°
10x-20=180
10x=200
x=20
(3x-15) + E = 180
3(20)-15 + E = 180
45 + E = 180
E = 135°
FG = EH = 2(y+1)