How Do I simplify this?
-3(x + 4y) + 2(x - 2y) + (3x -5y)

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose

What is the value of the discriminant, b2 ? 4ac, for the quadratic equation 0 = x2 ? 4x + 5, and what does it mean about the number of real solutions the equation has?