Answer:
$ 60
Step-by-step explanation:
10 x 12 feet is the size of the patio... this is 120 feet, or 1,440 inches...
if each square has a side of 12 inches, you will need (1440 / 12) 120 squares...
since each square costs 50 cents, it will cost her 60$ to carpet her patio!!
Hope this helps!!