SOLUTION: Amy travels 450 miles at a certain speed. If the car had gone 15mph faster, the trip would have taken one hour less. Find Amy's speed.
A. 78 mph
B. 75 mph
C. 68 mph
D. 72 mph
Algebra.Com
Question 22892: Amy travels 450 miles at a certain speed. If the car had gone 15mph faster, the trip would have taken one hour less. Find Amy's speed.
A. 78 mph
B. 75 mph
C. 68 mph
D. 72 mph
Answer by Paul(988) (Show Source): You can put this solution on YOUR website!
450(-x+15)=450(-x-1)
-450x+6750=450x-450
-900x=-7200
x=8
15x=450
x=30
30 x 2 because x+x=2x ... 15+x+x=15=2x
60+8
=68
Hence, the speed is 68miles per hour.
RELATED QUESTIONS
Amy travels 450 miles at a certain speed. If the car had gone 15mph faster, the trip... (answered by venugopalramana)
Amy travels 450 miles at a certain speed. If the car had gone 15mph faster, the trip... (answered by venugopalramana)
What is Amy's speed if she travels 450 miles at a certain speed. If the car had gone... (answered by mananth)
I need help with this
Amy travels 450 miles at certain speed. If the car had gone 15... (answered by ankor@dixie-net.com)
Sam's Subaru travels 280 miles at a certain speed. if the car had gone 5 mph faster, the (answered by oberobic)
Imogene's car traveled 450 miles at certain speed. If car had gone 5 mph faster, the... (answered by ankor@dixie-net.com)
car traveled 432miles averaging a certain speed. If the car had gone 6 mph faster, the... (answered by josmiceli,josgarithmetic)
amy travels 450 miles at a certain speed. If the car had gone 15 mph faster, the trip... (answered by richwmiller)
Car traveled 504 mi averaging a certain speed. If the car had gone 7 mph faster, the trip (answered by lmeeks54)