<h2>
Hello!</h2>
The answer is:
The correct option is:
A) $74.55
<h2>Why?</h2>
To calculate how much does Sonya pay for the four pairs altogether, we need to calculate the original price after the 50% discount and the taxes.
Calculating we have:

We have that before the tax, the price of the shoes was $17.5, then, calculating the price after the taxes, we have:

So, we have that the price after discount and the taxes is $18.637 per each pair of shoes.
Hence, the price for the four pairs of shoes will be:

Have a nice day!
Answer:
512
Step-by-step explanation:
each number is a sum of the two numbers in the row above it.
Step-by-step explanation:
-3x² + 2y² + 5xy -2y + 5x² - 3y²
= -3x² + 5x² +2y² -3y² + 5xy -2y
= 2x² - y² +5xy -2y
2 terms