Answer:
3.44 square feet
Step-by-step explanation:
Please kindly check the attached file for explanation and the picture of the poster board.
let's convert the mixed fraction to improper fraction, and then check.

X+2y=10
6x+6y=6 -> x+y=1
(x+2y=10)-(x+y=1)=y=9
x+(2*9)=10
x+18=10
x=-8 and y=9 -> c
36,000.
40,000 - 4000 = 36,000