What are the coordinates of point S"?

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

50 points~ ! i have to turn this in tomarrow

Let x = a + bi and y = c + di and z = f + gi. which statements are true?