Answer:
x = -12
Step-by-step explanation:
4/3x + 12 = - 4   (multiply 3 both side)
4x + 36 = - 12 (minus 36 both side)
4x + 0 = -12
4x = -12 - 36
4x = - 48 (divide both side)
4x ÷ 4 = x
-48 ÷ 4 = -12
Answer: x = -12
 
        
             
        
        
        
The volume would be (x+1)x(x+4)x(3x)= (x^2+x+4x+4)x(3x)= (x^2+5x+4)x(3x)= (3x^3)+(15x^2)+(12x)
Hence, the answer is the 4th option. 
Hope this helped you, and if it did, please mark it as the brainiest answer. I would really appreciate it!
        
             
        
        
        
Answer:
x       y
15     -1
12     0
9       1
6       2
3       3
0       4
Step-by-step explanation:
This is a function table. For a linear function, find the average rate of change between the listed points called slope. Then use the slope to fill in other inputs and outputs for the function.

This means for every 3 units made in the input, the function moves down 1 output.
x       y
15     -1
12     0
9       1
6       2
3       3
0       4
 
        
             
        
        
        
Answer: 814.26
Step-by-step explanation: