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Ella can drive 65 mi on side roads in the same time that it takes to drive 30 mi on the interstate. Ella's rate on the side roads is 7 mi faster than her rate on the interstate, what is her rate on the side roads?



  • Math -

    Use the equation distance = rate multiplied by time (d = r*t).

    Let s be her rate on the side roads.

    d = r*t
    65 = s*t

    Now, form a similar equation (using the numbers 30 & 7).

    After you come up with your two equations, use either substitution or elimination to solve it.

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