SOLUTION: Richard drove his rig at �x� mph for 3 hours, then increased his speed to (x + 15) mph and drove 2 more hours. Write a polynomial that represents the total distance that he travele

Question 212106: Richard drove his rig at �x� mph for 3 hours, then increased his speed to (x + 15) mph and drove 2 more hours. Write a polynomial that represents the total distance that he traveled. How much distance he covered if x = 45 Mph?
Answer by drj(1380) (Show Source): You can put this solution on YOUR website!
Richard drove his rig at �x� mph for 3 hours, then increased his speed to (x + 15) mph and drove 2 more hours. Write a polynomial that represents the total distance that he traveled. How much distance he covered if x = 45 Mph?

Step 1. Distance=Velocity * Time

Total Distance in miles =

where

is the distance in miles traveling for 3 hours at x mph
is the distance in miles traveling for 2 hours at x+15 mph

Step 2. Substitute x=45 Mph into Total Distance equation of Step 1

Step 3. Total Distance traveled is 255 miles.

For Step-By-Step Videos in Introduction to Algebra, please visit http://www.FreedomUniversity.TV/courses/IntroAlgebra.

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