The regular price of a shirt is $15. Natalie bought it on sale for 0.9 times its regular price. Then the sale price was multiplied by 1.06 to include the tax.

$14.31

Step-by-step explanation:

Assuming it is the final price Natalie paid that you want:

Selling price = 0.9 * 15

= $13.50

To cater for tax it was then multiplied by 1.06:

= 13.5 * 1.06

= $14.31

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square

lol

step-by-step explanation: