Answer:
C $18.72
Step-by-step explanation:
1. $13.50+$4.50= $18.00
2. $18.00* 4%=$0.72 sale tax
3. $18.00+$0.72= $18.72 your answer
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Hey there!
ANSWER: 
EXPLANATION:
To find the answer to your question, you will need to add.

First, multiply the denominator.

So the denominator will be 20.
Now move on to the numerator. Multiply 5 by 3.

Now multiply 4 bu 2.

If you want to get the numerator, add what you got after multiply.

The numerator is 23. So now let's complete the fraction.

This is your answer!
Hope this helps!

This are similar answers to your questions.
2 1/4 + 1 2/4 ≠ 5
Why?
2 1/4 + 1 2/4
=3 3/4
The answer is wrong because the student added wrong. The real answer is 3 3/4.