9*4.25=  38.25  square inches.
        
             
        
        
        
Answer:
Incorrect.
Step-by-step explanation:
Let, the first number is x, and the second number is y. Given, the second number is 125% of the first number. So, the equation will be
y = 1.25 x
Or, y= 5/4x
Now, multiplying it with 4/5, we get, x= 4/5y
Or, x= 0.80 y
But, Brad is saying the first number must be 75% of the second number. But here we see that the first number is 80% of the second number. That's why Brad is incorrect. 
 
        
             
        
        
        
3/4. 4/8= 2/4. so 1/4+2/4=3/4
        
                    
             
        
        
        
Answer:
option A
12m/s
Step-by-step explanation:
Given in the question,
mass of object = 11kg
kinetic energy possess by = 792 joules
To find the velocity we use formula 
 v =  
Plug values in the formula
 v = 
 v = 
 v = 
 v= 12 m/s
 
        
             
        
        
        
J=-8c²-4cd-d²
k=-3c²+7cd-3d²
j+k=
-8c²-4cd-d²-3c²+7cd-3d²
-11c²-4d²+3cd