Answer:
4/76 or simplified as 1/19
Step-by-step explanation:
5/20 is for the probability of the first balloon
4/19 is for the probability of the second balloon
5/20 can be simplified to 1/4 so 1/4 x 4/19 = 4/76
4/76 can also be simplified to 1/19
Answer:

MN means line joining point M to point N.
F(x) = 1.50x + 12.50
f(18) = 1.50(18) + 12.50
f(18) = 27 + 12.50
f(18) = 39.50 ....this is the amount Kelsey paid for 18 movies in 1 month