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Answer:
, 
Step-by-step explanation:
Volume: length* height * width
In the first diagram:

The volume is
cubic feet
Next diagram:

The volume is
cubic yards
B. b(x) = (50x) - 150
C. f(x) was moved down 150 units
I hope this helps!
1) 2x+1x= 63
2) 3x= 63
3) 3x/3= 63/3
4) x= 21
5) 2(21)+1(21)=63
6) 42+21= 63
The 2 groups would be 42 to 21.