PRE*******ALGEBRA
posted by Tanisha on .
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.

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 
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 
the answer is the answer.