Answer:
y=5x-10
Step-by-step explanation:
y+10=5x
Answer: 54 mph
d-the distance
s+9 - the speed to the conference
d=6*(s+9)
s- is the speed on the way back home
d=7*s
so 6*(s+9)=7*s
6s+54=7s
-6s -6s
54= 7s-6s
s=54 mph
Answer: See below
hope it helps.........
