**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