Math...Help.Thx

20. READING: The number of pages P a student can read varies directly with the amount of time T in minutes spent reading. The student can read 90 pages in 60 minutes. Write an equation that relates P and T. PREDICT the number of pages the student can read if 90 minutes is spent reading.

21. MOVIES: The Cost C of going to the movies varies directly with the number N of people attending. A group of four paid $14 to go to the movies on Friday. Write an equation that relates C and N. How much would it cost for 7 people to go to the movies?

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asked by Jake
  1. CAN SOMEONE HELP ME PLEASE? STRUGGLING WITH BOTH OF THESE ?'s... PLEASE HELP!!! Merci.

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    posted by Jake
  2. P = k T
    90 = k (60)
    k = 9/6 = 1.5 pages/min

    if T = 90
    P = 1.5*90 = 135
    =====================
    C = k N
    14 = k (4)
    k = 14/4 = 7/2
    so
    C = 3.5 N
    if n = 7
    C = 3.5 * 7 = 49/2 = 24.5

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    posted by Damon
  3. I got something different but I'll figure out how you got that. Thankyou.

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    posted by Jake

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