What’s the answer to this

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 as a product of two polynomials. 2(3–b)+5(b–3)^2

7x^2-9x+5=0 find the discriminant and number of real solutions