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A math teacher drove by a playground that was full of boys and dogs.The teacher notice there were a total of 40 heads and 100 feet. Hom many boys and how many dogs were there?

  • Math -

    Let x = boys and y = dogs

    x + y = 40, then x = 40-y

    2x + 4y = 100

    Substitute 40-y for x in second equation and solve for y. Insert that value into the first equation and solve for x. Check by inserting both values into the second equation.

  • Math -

    10 dogs
    30 kids

  • Math -


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