The answers are:
P(9, 2) = 72
P(5, 5) = 120
P(7, 7) = 5040
These are examples of permutations. The problems are asking us to find the total number of ways an event can happen.
In the first case, P(9, 2), we are asked to find the ways that 2 things can be chosen out of a group of 9.
9 x 8 = 72
P(5, 5) = 5 x 4 x 3 x 2 x 1 
P(7, 7) =  7 x 6 x 5 x 4 x 3 x 2 x 1
        
             
        
        
        
Answer:

Step-by-step explanation:
The domain of a rational function is all real numbers <em>except </em>for when the denominator equals 0. 
So, to find the domain restrictions, set the denominator to 0 and solve for x. 
We have the rational function: 

Set the denominator to 0: 

Subtract 9: 

So, the domain is all real numbers except for -9. 
In other words, our domain is all values to the left of negative 9 and to the right of negative 9. 
In interval notation, this is: 

And we're done :)
 
        
             
        
        
        
Answer:
4.8
Step-by-step explanation:
Multiply 5*4.8 equal 21.6
 
        
             
        
        
        
Answer:
what kinda... what do they give yall these days but anyways,
Step-by-step explanation:
Divide each term by 
23 and simplify.
Exact Form:
d=109/23
Decimal Form:
d=4.73913043
um…
Mixed Number Form:
d=4 17/23
 
        
             
        
        
        
Answer:
Imaoo
Step-by-step explanation:
answer: C