Notice that the denominators are 3 and 7, which are factors of 21.
So express all the fractions with denominator 21:
On Monday 

 are sold
On Tuesday 

 are sold
On Wednesday 

 are sold
by Thursday 

 of the tickets was sold.
Answer: 
 
 
        
        
        
Answer:
its just 9
Step-by-step explanation:
Divide: 3 : 1 / 3 = 3 / 1 · 3 / 1 = 3 · 3 / 1 · 1 = 9 / 1 = 9 Dividing two fractions is the same as multiplying the first fraction by the reciprocal value of the second fraction. The first sub-step is to find the reciprocal (reverse the numerator and denominator, 
 
        
                    
             
        
        
        
Answer: The blue diamond "6c-18"
Step-by-step explanation:
Because the 6 would distribute with the c, so 6c, then it would distribute with the 3, which would be 18, because 6x3=18. Then the equation becomes 6c-18
 
        
             
        
        
        
Answer:
estimate - 400
product - 385
Step-by-step explanation:
estimate - 77 rounds up to 80
80*5=400
product - 70*5=350
7*5=35
350+35=385