Answer:
P(B) = 0.85
Step-by-step explanation:
We use the conditional probability formula to solve this question. It is

In which
P(B|A) is the probability of event B happening, given that A happened.
is the probability of both A and B happening.
P(A) is the probability of A happening.
In this question:

These events are independent.
This means that
. So



So

Answer:
x = 7
Step-by-step explanation:
3x - 2 and 2x + 5 are alternate interior angles and congruent, thus
3x - 2 = 2x + 5 ( subtract 2x from both sides )
x - 2 = 5 ( add 2 to both sides )
x = 7
If x = 7 then a and b are parallel