Answer:
well i do not know and would not know what those ovals are or whatever they are but the dude before is right .
Step-by-step explanation:
 
        
             
        
        
        
The first derivative is 5
        
             
        
        
        
Answer:
-⅙ Im pretty sure this right
 
        
                    
             
        
        
        
The price of less expensive equipment is $1575.
Step-by-step explanation:
Let, 
Price of one equipment = x
Price of other equipment = y
According to given statement; 
x+y=4000   Eqn 1
x = y+850    Eqn 2
Putting Eqn 2 in Eqn 1

Dividing both sides by 2;

Putting y=1575 in Eqn 2;

The price of less expensive equipment is $1575.
Keywords: linear equation, substitution method
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