Answer:
Each book cost $3.55
Step-by-step explanation:
 
        
             
        
        
        
See the attached picture for 2 options for question 1 and 2 depending on how the fractions are written.
Question #3:
17 = -13 - 8x
Add 13 to each side:
30 = -8x
Divide both sides by -8:
X = 30 / -8
X = -3 3/4
 
        
             
        
        
        
Because it directly passes through the x and y axis
        
                    
             
        
        
        
300 mg/tablet
150 tabletsx(300mg/1 tablet)=150x300=45000 mg=45 grams
        
                    
             
        
        
        
Just keeping going with 16×-2=?×-2=?×-2 untill u get you your ninth nuber as well with tge 2 is a negative, so a a positive × a negative equal a negative and a negative × a negative equal