Abag contains 14 gray, 7 black and 10 white marbles. a marble is drawn at random. what is the theoretical probability, as a decimal, of drawing a black marble? round the decimal to the nearest hundredth.

14 + 7 + 10 = 31 marbles total

7/31 = 0.23 or 23%

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system