Hello,
Answer:
x = 13
Step-by-step explanation:
7x + 5 + 5x + 19 = 180
⇔ 12x + 24 = 180
⇔ 12x = 180 - 24
⇔ 12x = 156
⇔ x = 156/12
⇔ x = 13
Answer: 0.78
Step-by-step explanation:
Given : P(bridge and swim) = 0.67
P(bridge)= 0.86
Formula for conditional probability :

So, 

Hence, the probability that the member swims, given that the member plays bridge = 0.78
So 15 minus the flat fee is 11.25 divided by .85 is 13.23 km rounded 13km
b is between those two nu,ners