Answer:
Step-by-step explanation:
3n + 5.6?
I don't fully understand what you're asking.
 
        
             
        
        
        
Answer:
f(-3) = 9
Step-by-step explanation:
Step 1: Define
f(-3) = x = -3
f(x) = x²
Step 2: Substitute and Evaluate
f(-3) = (-3)²
f(-3) = 9
 
        
             
        
        
        
Answer: The side length is 3 yards.
Step-by-step explanation:
To find the area of a square, you have to square one of it's side lengths since they all share the same length.  Since we know the area, and we need to find the side length so we just need to find the square root of the area. 
 = 3
 = 3    
The side length is 3 yards.
 
        
             
        
        
        
Answer:
Step-by-step explanation:
^^there are 20 Trucks in total  And 5 cars 
 
        
                    
             
        
        
        
Answer:
false
Step-by-step explanation:
as a guy who studied calculus, a lot of things were done that are just mathematically incorrect. for instance,
infinity - infinity is not 0. 
0÷0 is undefined. so you cant just equate it to ( 2 × infinity)
to sum up this proof is entirely false.
if you still have any doubts make sure to ask.