Answer:
Step-by-step explanation:
326.56
2x(3.14)x4^2 = 100.48
11.48+(2x(3.14)x4x9) = 326.56
1: -12-9=7x-4x
2: -21=3x
3: x=-7
x -4, y -1 2. x3.5, y-1
B.