Answer:
 your answer in ☝️ this pic
Step-by-step explanation:
plzzzzzzz follow me
and Mark my answer in brainlist
 
        
             
        
        
        
Answer:
I believe 21 cm
Step-by-step explanation:
 
        
             
        
        
        
Answer:
C 5a^2 +70a +240
Step-by-step explanation:
We have given these following functions:

h(a+4)
This function is:



f[h(a+4)]

Thus

The correct answer is given by option C.
 
        
             
        
        
        
-4.2c+4.8d is the answer to this equation.