Answer:
4n -13
Step-by-step explanation:
notice that the difference between the adjacent terms is 4. 
nth term is given by:
nth term = first term + (n-1) × difference -n is any number
= -9 + (n-1) × 4
= -9 + 4n -4
= 4n -13
 
        
             
        
        
        
Answer:
x=1.5
Step-by-step explanation:
4x=6
6/4=1.5
 
        
             
        
        
        
Answer:
357.5ft^3
Step-by-step explanation:
solve for bottom reticular prism
8 * 10 * 4
320ft^3
solve for top triangular prism
((3*5)/2)*5
37.5ft^3
add top and bottom  
320+37.5
357.5ft^3