Help the following questions?

Draw out the fraction then show how you would subtract 5 1/4

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

Write two point-slope equations for the line passing through the points (6, 5) and (3, 1)