Expand each of the following expressions.(step by step) (a) (x – 3)(x + 1)
(b) (x + 2)(x + 4)
(c) (1 – 7x)(11x – 4)
(d) (4 – 3x)(2 – 3x)
(e) (2x – 5)(7x – 11)
(f) (6 – d)(2d – 5)

An energy plant is looking into putting in a system to remove harmful pollutants from its emissions going into earth's atmosphere. the cost of removing the pollutants can be modeled using the function c = 25000p/100 -p what is the vertical asymptote?

Find the value of x for which line a is parallel to line b

At a book fair, joe bought 24 books at 3 for $5 and had $2 left. how much money did he have at first?