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PRE*******ALGEBRA

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WRITE A FUNCTION RULE TO DESCRIBE EACH SITUATION.


PLEASE HELP I DO NOT UNDERSTAND THIS AT ALL.


The number of pounds p(z)as a function of the number of ounces z.


The selling price s(c)after a 45% markup of an item as a function of the stores' cost c.


The total number of miles m(r)covered when you walk 7 miles before lunch, and you walk for 2 hours at r mi/hr after lunch.

  • PRE*******ALGEBRA - ,

    How many ounces are in a pound? 16. So you multiply the number of ounces (z) by 16 to get the pounds. Therefore,

    p(z) = 16z


    The selling price (s) is the original cost (c) plus 45%. That is 1.45 * cost, or 1.45c. Therefore,

    s(c) = 1.45c

  • PRE*******ALGEBRA - ,

    The total number of miles m(r) covered when you walk 7 miles before
    lunch, and you walk for 2 hours at r mi/hr after lunch.

    M(r)= r2+7

  • PRE*******ALGEBRA - ,

    the answer is the answer.

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