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March 29, 2015

Homework Help: algebra please ck.

Posted by ann on Thursday, February 16, 2012 at 6:39pm.

joe wants to spend 70. dollars at most and has 60 cu inches of space left in his soldier's care package. candy costs $7 and takes up 3 cu inch of space phone cards cost $5. and take up 15 cu in. of space.

Is this correct? if not please change it or tell me how ??? thanks ann

1. write a system of 4 inequalities that model his possible purchases.
Let x = # of candy and y = # of phone cards.
I wrote 7x + 5y <= 70
3x + 15y <= 60
x<= 10 (limited money 10 x $7 <= 70)
y <= 4
limited space (4 x 15 cu in < = 60)

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