Find all real solutions to the equation.
x3 + 2x2 - 6x – 12 = 0

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

The perimeter of ? cde is 55 cm. a rhombus dmfn is inscribed in this triangle so that vertices m, f, and n lie on the sides cd , ce , and de respectively. find cd and de if cf=8 cm and ef=12 cm. the answer is not cd=20 and de=15. i have tried that one, it does not work.

If the equation of a perpendicular bisector of a triangle is y = 2x + 7, what is the slope of the side that it is bisecting? explain how you know.