X^2- y = 4
2x + y = -1
use graphing to find the solutions to the system of equations

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.

Find the measure of angle a in the following triangle