Answer:
123.75
Step-by-step explanation:
find the volume of the sandbox:
l x w x h = 11 x 7.5 x 1.5 = 123.75
3a + 2b - a - b =
3a - a + 2b - b =
2a + b
76.3
Answer: 0.83
-2.21z + 1.82a - 3.38
I think this is the answer