Answer:
B. 10,368 square yards
Step-by-step explanation:
120x90= 10800
24x18=432
10800-432= 10,368 square yards
9y - 5x = 20
or, (9y - 5x) / 20 = 1
or, 9/20 y - 1/4 x = 1
compare with x/a + y/b = 1
you'll get
x intercept (a) = -4
y intercept (b) = 20/9
The answer is 1 hr 28 min. picture included for work. there are other ways to solve this