SOLUTION: Raphael is traveling in a straight line at a constant speed from point A to point B. His distance from point B in miles is –20t + 45, where t is number of hours he has been travel

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Question 1122543: Raphael is traveling in a straight line at a constant speed from point A to point B. His distance from point B in miles is –20t + 45, where t is number of hours he has been traveling. What is his speed in miles per hour?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
-20 mi/hr
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Negative/positive depends on direction.