Minutes(m)              Cost
0                                  20
10                                22
20                                24
50                                30
slope formula:
m = (y1 - y2) / (x1 - x2)
m = (20 - 22) / (0 - 10) = -2/-10 = 1/5 or 0.20
y = (1/5)(x) + 20
The rule that describes Amy's monthly cost is:
m = 1/5x + 20 or m = 0.20x + 20
Where x is the number of minutes spent on the call.
        
             
        
        
        
Answer:
3
Step-by-step explanation:
(3 + √6) (3 - √6) = 9-3√6+3√6-6 = 9-6 = 3
(pls mark brainliest fam)
 
        
                    
             
        
        
        
We have been given two expressions  . We are asked to find the value of each.
. We are asked to find the value of each.
To find 9P9, we will use permutations formula.
 , where
, where 
P = Number of permutations,
n = The total number of objects in the set,
r = Number of objects being chosen from the set.


 Using
                   Using 

To find 9C9, we will use combinations formula.
 , where
, where 
C = Number of combinations,
n = The total number of objects in the set,
r = Number of objects being chosen from the set.


 Using
     Using 
Cancelling out  , we will get:
, we will get:


The answers differ because order. With permutations we care about the order of the elements, while with combinations we don't.   
 
        
             
        
        
        
If it takes that long to make one pair, then i’d say maybe 468 hours to make all 36 pairs
        
                    
             
        
        
        
Answer:
B. 0
Step-by-step explanation:
=>d+(-d)
=>d-d
=>0