8 Carlos and Clarita have found different cat pens and dog runs to purchase. The cats get a little more space,
the dogs will have a little less space, and the cost is different.
• Cat pens will require 9 square feet of space, while dog runs will require 18 square feet. The shed has
a maximum of 360 square feet of space available for the pens and runs.
• The twins have no more than $1280 to spend on purchasing the cat pens and dog runs. Each cat pen
will cost $20 and each dog run will cost $40.
a) Write a system of inequalities (where is the number of cats and y is the number of dogs).