I believe the answer for 17 is C.  18 I am not sure how to do.  For 19, however, the answer is B.  Hope I help, and sorry I can't answer 18.
        
             
        
        
        
Answer:
1.6 ft
Step-by-step explanation:
If you use the Pythagorean Theorem to solve for x, you get:


Rounded to the nearest tenth, the answer is 1.6
 
        
             
        
        
        
Answer:
(a - 7)(3 - x)
Step-by-step explanation:
Given
3(a - 7) - x(a - 7) ← factor out (a - 7) from both terms
= (a - 7)(3 - x)
 
        
             
        
        
        
1,70 2,140 3,210 so on and so forth. The function would be y=70x
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
percent increase = ((new number - original number) / (original  number))  * 100
                              = ((910 - 650) / 650)  * 100
                              = (260 / 650) * 100
                              = 0.4 * 100
                              = 40% <===== Maki's  increase