The area of the cross-section is 169 sq. cm. 
That is the correct answer to this problem
        
             
        
        
        
Domain: (-∞,∞) or All real numbers
Range: (-∞,∞) or All real numbers
 
        
             
        
        
        
Answer:
12 2/3 
Step-by-step explanation:
 I'm too lazy to give an explanation. Hope this helped though.
 
        
             
        
        
        
Answer:
See below.
Step-by-step explanation:
Substitute the value for the variable and solve.
a.)
⇒ y = -5(3) + 17
⇒ y = -15 + 17
⇒ y = 2
b.)
⇒ y = 3(3) - 22
⇒ y = 9 - 22
⇒ y = -13
c.)
⇒ y = 2(3) - 25
⇒ y = 6 - 25
⇒ y = -19
d.)
⇒ y = 6(3) - 39
⇒ y = 18 - 39
⇒ y = -21