Which expression is equivalent to 8a + 20?
4(2a + 20)
4(2a + 5)
4(4a + 16)
4(4a + 5)

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?