What is the difference of the polynomials?

What expression is equivalent to (2x-1)(x-3)?

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Clara schumann is buying bagels for her coworkers, she buys a dozen bagels priced at $5.49 a dozen. the bakery's cost for making the bagels is $2.25 per dozen. what is the markup rate based on selling price on a dozen bagels?