Simplify each product. write in standard form.
29.
(w + 1)(w + 12)
31.
(3r - 2)^2
33.
(7q + 2)(3q + 8)

I’m stuck on this i don’t understand.

Which of the following contains a variable?

Jake bakes and sell apple pies. he sells each pie for $5.75 . the materials to make the pies cost $40. the boxes jake puts the pies in cost & 12.50 total. how many pies does jake need to sell to earn a profit of $50