algebra

The time,t, required to drive a certain distance varies inversely with speed,r. If it takes 12 hours to drive the distance at 60 miles per hour, how long will it take to drive the same disatcne at 85 miles per hour?

about 7.08 hours?
about 5.00?
or 8.47 hours?

please show me your work so i can undertstand!

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  1. t = k/s
    12 = k/60
    k = 12*60

    t = (12*60) / 85
    or
    t = 8.47 hours

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  2. do you have the rest of the answers for the test?

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  3. I'll take that as a no.

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  4. its different for everyone

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