Plug in
2(2) + 3(-3) + (-5)
4 + (-9) + (-5)
4 + (-14)
-10
Answer is -10
2x + 3y + z = -10
Complete Question
Calculating conditional probability
The usher at a wedding asked each of the 80 guests whether they were a friend of the bride or of the groom.
Here are the results:
Bride
:29
Groom
:30
BOTH : 20
Given that a randomly selected guest is a friend of the groom, find the probability they are a friend of the bride.
P (bride | groom)
Answer:
The probability is 
Step-by-step explanation:
The sample size is 
The friend of the groom are 
The friend of the groom are 
The friend of both bride and groom are
The probability that a guest is a friend of the bride is mathematically represented as

The probability that a guest is a friend of the groom is mathematically represented as

The probability that a guest is both a friend of the bride and a friend of the groom is mathematically represented as

Now
is mathematically represented as

Substituting values


Answer:
20 ft by 14 ft
Step-by-step explanation:
See attached image.
3 is 25% of 12, so if you apply the same proportion to 180, a quarter of 180 is 45!!