SOLUTION: Lorena bought 10 packs of styrofoam cups for the graduation dance. a pack of fifty 12-oz cups costs $1.80 and apack of fifty 16-oz cups costs $2.40. Lorena paid a total of $21.60 e
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-> SOLUTION: Lorena bought 10 packs of styrofoam cups for the graduation dance. a pack of fifty 12-oz cups costs $1.80 and apack of fifty 16-oz cups costs $2.40. Lorena paid a total of $21.60 e
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Question 181451: Lorena bought 10 packs of styrofoam cups for the graduation dance. a pack of fifty 12-oz cups costs $1.80 and apack of fifty 16-oz cups costs $2.40. Lorena paid a total of $21.60 excluding tax. How many packs of each size cup did she buy? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = the number of packs of 12 oz cups she bought
Let = the number of packs of 16 oz cups she bought
given:
(1)
(2)
Multiply both sides of (1) by 180 and subtract from (2)
(2)
(1)
and, since
(1)
She bought 4 packs of 12 oz cups and
6 packs of 16 oz cups
check answer:
(2)
(2)
OK
