Edgar has 40 shirts. The equation you could write is 24+16=40.  Hope this helps!!
        
             
        
        
        
The tens digit is 8 more than the ones digit. There isn't any zeros.
The maximum digit is 9 because 10 would be 2 digits, 1 and 0. 
So say the tens digits is 9.
9 _
The ones digit is 8 less so 9-8 = 1
9 1
There isn't any zeros which is correct.
The answer is 91.  
 
        
             
        
        
        
Yes, Bobby will have enough money if he saves for 9 weeks. You can find this through either substituting w for 9 in the equation, or solving the equation itself. 
Substituting:

Substitute w for 9. 

Simplify. 

Solve. 
255 is greater than 250, so yes, he will have enough money saved. 
Solving the equation:

Original Equation

Subtract 30 from both sides. 

Divide both sides by 25. 
The number of weeks he needs is 8.8. When rounding it up, you get 9. 
 
        
        
        
Answer:
Fact Families
Step-by-step explanation:
They are fact families
 
        
                    
             
        
        
        
Answer:
2/11
Step-by-step explanation:
Probability is the LIKELIHOOD of an event.
According to the word problem, there are 11 people in total and 2 of them are being selected.
The probability of them being the 2 oldest people is 2 in 11, or 2/11.