Answer: 30x
Step-by-step explanation:
x
x 
This can also be written as :

= 
which could be written as :
x 
= 30x
22.
Alternate angles23.
4: (

, substitute b with 10 and a with 20 and you get 4.)
24.
0.28: 0.12 + 0.60 = 0.72. Probability is always out of 1, so 1 - 0.72 should give you the probability of losing, which is 0.28.