Answer: 
Step-by-step explanation:
According to the permutations:
The arrangement of n things in an order = n!
If we fix that the first, second, and third person for skating, then we to arrange only 17 of the skaters.
Number of ways to arrange rest of 17 skaters = 17!
Number of ways that Christie, Taylor, and Jona will skate first, second, and third, respectively = 1 x 17!=17!
Number of ways to arrange all 20 skaters = 20!
Now, the required probability = 

Hence, the required probability =
-9-(-12)=-9+12=3
-9-12=-9+(-12)=-21
What is the question. Is it asking for a picture of a line. Is it making a statement? Asking for a slope?
Answer:
14y-4
Step-by-step explanation:
Distribute 2 to both the left and right side.
Combine like terms.
14y-4
Answer:
x = 159; y = 140
Step-by-step explanation:
a = 40
a + y = 180
y = 180 - 40
y = 140
b = 61
b = (180 - x) + a
61 = 180 - x + 40
x = 159