SOLUTION: CAN YOU PLEASE HELP ME WITH THIS PROBLEM Chrystal drove 30 miles at x mph before 6:00 a.m. After 6:00 a.m.,she increased her speed by 9 mph and drove 10 additional miles. Use

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: CAN YOU PLEASE HELP ME WITH THIS PROBLEM Chrystal drove 30 miles at x mph before 6:00 a.m. After 6:00 a.m.,she increased her speed by 9 mph and drove 10 additional miles. Use       Log On


   



Question 307428: CAN YOU PLEASE HELP ME WITH THIS PROBLEM
Chrystal drove 30 miles at x mph before 6:00 a.m. After 6:00 a.m.,she increased her speed by 9 mph and drove 10 additional miles. Use the fact that D=RT to write an expression for her total traveling time.

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
d = rt
t = d/r
t = (30/x) + 10/(x+9)
-----------------------
or
t+=+%2830%28x%2B9%29+%2B+10x%29%2F%28x%5E2%2B9x%29
t+=+%2840x+%2B+270%29%2F%28x%5E2%2B9x%29