Linear Equations in Two Variables

SAT Math· difficulty 5/5

Tom drives at 60 mph and Jerry drives 12 mi behind at 70 mph. Jerry catches Tom after:

  • A

    2.02.0 h

  • B

    1.01.0 h

  • C

    1.51.5 h

  • D

    1.21.2 h

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Explanation

Closing rate 1010 mph; 12/10=1.212/10 = 1.2 h.

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