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11) cost per day plus the cost per pastry times the # of pastries is less than or equal to 500.

p= # of pastries

119+2.25p<=500
subtract 119 from both sides
2.25p<=381
divide both sides by 2.25
p<=169.33

Answer: C) 119+2.25p<=500; p<169

12) Add the two numbers together.
-1.56 + 0.73= -0.83

Answer: D) -0.83 pounds

13) t= cost per ticket

$ spent at concession plus 5 tickets times the cost of the tickets (t) equals the total.

$29.25 + 5t= $55.50
subtract 29.25 from both sides
5t= 26.25
divide both sides by 5
t= $5.25 price of each ticket

Answer: C) 29.25 + 5t=55.50; t=$5.25

Hope this helps! Good luck! :)