SOLUTION: Write an algebraic expression for the verbal description. The travel time for a plane traveling at a rate of r kilometers per hour for 640 kilometers.

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Question 647267: Write an algebraic expression for the verbal description.
The travel time for a plane traveling at a rate of r kilometers per hour for 640 kilometers.
Answer by colliefan(242) About Me  (Show Source):
You can put this solution on YOUR website!
speed or rate = distance/time
r=d/t
rt=d
t=d/r
t=640 km/r

Check out the unit factor and dimensional analysis for the easiest way to solve such problems. You'll find it if you search for it. Bug your teacher to explain it. A chemistry teacher may use it more often than a math teacher.