Answer:
x - 9 = 12
Step-by-step explanation:
We can use x as "a number"
So the equation so far is just "a number", or x.
Decreased by 9 can also be said as subtracted by 9, so that makes the equation x - 9.
"is 12" can also be said as equals 12, which makes the equation x - 9 = 12
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


<span>$38.40 is the simplest interest. </span>
The answer would be 5625.
So all you have to do here is,
Whats 5% of 4321
Witch = $216.05