Answer:
the unit rate is 1.33$ per pound of apples
Step-by-step explanation:
you can rewrite the word problem as 
3x = 3.99.
now just divide both sides by 3.
3x / 3 = 3.99/3
x = 1.33
 
        
                    
             
        
        
        
Let's say that Bob is x and James is y
x + y = 180
x = 2y
2y + y = 180
y = 60.
James spent 60 dollars. 
        
                    
             
        
        
        
Answer:
about 324 times.
Step-by-step explanation:
2400/7
342.857142857
 
        
                    
             
        
        
        
Answer:
9 sqrt(2) /2 = PQ
Step-by-step explanation:
Since this is a right triangle, we can use trig functions
sin theta = opp/ hypotenuse
sin 45 = PQ = 9
9 sin 45 = PQ
9 sqrt(2) /2 = PQ