Age Probs

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Lisa is 16 years younger than Andy. In 6 year, the sum of their ages id 42. How old is Lisa now?

  • Age Probs -

    now, L = A-16
    In 6 years, (L+6) + (A+6) = 42
    so, substitute:

    (A-16)+6 + A+6 = 42
    2A = 46
    A = 23
    So, Andy is 23, Lisa is 7

    In 6 years, they will be 29 and 13, which add to 42

  • Age Probs -

    A candy company packages mixed candies. How much white chocolate selling at $2.75 a pound must be added to 4 pounds of dark chocolate selling at $3.95 a pound to produce a mixture selling for $3.30 a pound?

  • Age Probs -

    just add up the cost of each kind. The cost must equal the total.

    If there are x pounds of white chocolate needed, then the cost obeys

    2.75x + 3.95*4 = 3.30(x+4)
    x = 52/11 = 4.73 lbs

    Odd answer. Is there a typo somewhere?

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