SOLUTION: Steve traveled 200 miles at a certain speed. Had he gone 10mph faster, the trip would have taken 1 hour less. Find the speed of his vehicle.

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Question 149897This question is from textbook
: Steve traveled 200 miles at a certain speed. Had he gone 10mph faster, the trip would have taken 1 hour less. Find the speed of his vehicle. This question is from textbook

Answer by mangopeeler07(462)   (Show Source): You can put this solution on YOUR website!
x=speed
y=time

200/x=y
200/x+10=y-1

Plug in y in the second equation
(200/x+10)=(200/x)-1

Common denominator=


Subtract on the right


Eliminate the denominator.
Subtract 200x from both sides


Reorder the right side


Take out a ngeative one


Factor


Solve
x=-50
x=40

since speed can't be negative, x=40, so

40 mph

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