Answer:
Answer: Janet is 16, and David is 11.
Step-by-step explanation:
Let the ages be j and d.
j = d + 5
j + d = 27
Substitute d + 5 for j in the second equation.
d + 5 + d = 27
2d + 5 = 27
2d = 22
d = 11
Substitute 11 for d in the first equation.
j = d + 5
j = 11 + 5
j = 16
Answer: Janet is 16, and David is 11.
 
        
             
        
        
        
I dont know what you're asking, the property? That is distributive, and the answer of the expression is 7y+35
        
             
        
        
        
Answer: 120
Step-by-step explanation:
From the question, we are informed that there are 10 people in a math club and that three people will be chosen for the Pi Day committee. 
The number of different ways that the club members can structure the committee goes thus:
This can be solved by:
nCr = n! / r! (n - r)!
where n = 10
r = 3
= n! / r! (n - r)!
= 10! / 3! (10 - 3)!
= (10 × 9 × 8) / (3 × 2)
=120
 
        
             
        
        
        
Answer:
0.25
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
17.5 L
Step-by-step explanation:
There are 17.5 Liters in 17,500 ML.
Hope this helps!
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