SOLUTION: The number of pages p a student can read varies directly with respect to time t in minutes spent reading. The student can read 90 pages in 60 minutes. Write an equation that rela

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: The number of pages p a student can read varies directly with respect to time t in minutes spent reading. The student can read 90 pages in 60 minutes. Write an equation that rela      Log On


   

Question 894120: The number of pages p a student can read varies directly with respect to time t in minutes spent reading. The student can read 90 pages in 60 minutes. Write an equation that relates pages read & time. Predict the number of pages in 90 minutes.
Answer by josgarithmetic(39613) About Me  (Show Source):
You can put this solution on YOUR website!
p=kt using k as proportionality constant. This k is also the READING RATE in pages per minute.

Given p=90 and t=60, k=p%2Ft=90%2F60=3%2F2.

The student reads according to highlight%28p=%283%2F2%29t%29.

Your question is, find p for t=90; so just substitute this and compute p.
p=%283%2F2%29%2A90
p=3%2A45
p=135