Factor this expression completely
45x - 18y + 36

A. 9y(5x-2y+4)

B. -9(5x+2y+4)

C. 5(9x-2y+4)

D. 9(5x-2y+4)

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.

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?