Answer:
There's one important property which states that when a number is multiplied by its reciprocal, equals 1.
The commutative property of multiplication states that two or more numbers can be multiplied in any order, therefore, the expression:  (7)×(13/29)×(1/7) can be changed to  (7)×(1/7)×(13/29) and the result won't be altered. 
Now, given that 7 and 1/7 are reciprocals, the result is 1. Therefore, the result of the multiplication equals (13/29)
 
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
We have been told that the ratios are inversely proportional in our given problem. We are asked to find the missing value.
We know that two inversely proportional quantities are in form  , where, y is inversely proportional to x and k is the constant of proportionality.
, where, y is inversely proportional to x and k is the constant of proportionality.
Let us find constant of proportionality using  and
 and  in above equation.
 in above equation.



Now, we will use  and
 and  in our equation to find
 in our equation to find  as:
 as:



Therefore, the value of  is 9.
 is 9.
 
        
             
        
        
        
There are 8 Jacks and Queens and 8 King and Aces
3*8+5*8=24+40=64 $
        
             
        
        
        
Answer:
3.2
Step-by-step explanation:
First, evalue what's inside of the absolute value: 
3.1 + (-6.3) = -3.2
Now, since absolute value means the distance from the number to 0, the absolute value of -3.2 is the negation of -3.2: 
|-3.2| = 3.2
 
        
             
        
        
        
Answer: x = 11
To start, we know that a whole circle equals 360 degrees. If we subtract the 2 arcs we know, 85 and 31, we have 244 degrees left for the 2 congruent arcs. Dividing that by 2 gives us 122 for each arc.
Now, write the equation:  122 = 13x - 21
Solve this, to find the x = 11.