Linear Functions

SAT Math· difficulty 5/5

A machine fills 4 boxes per minute starting from 50 boxes. A second machine, starting from 80 boxes, fills 2 per minute. They reach the same total at tt min, where t=?t = ?

  • A

    1515

    check_circle
  • B

    2020

  • C

    3030

  • D

    1010

Explanation

50+4t=80+2t2t=30t=1550 + 4t = 80 + 2t \Rightarrow 2t = 30 \Rightarrow t = 15.

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