Solving system of linear equations

Question

Questions:

Solving system of linear equations

i) Solve he following equation by the quadratic formula :
3X² + 4X -23 = 0

ii) Find the values of x and y that satisfy the equations here given
( use the simultaneous equation method ) :

                 3x + 2y = 22
                 2x + 3y = 23

iii) Solve graphically the following equations: show the graph as a part of the solution.
                                    x+y=5
                                    x-y=1

iv) Using determinants solve the following equations :

a) 2x+y = 3
    x+y = -2

b) 4x + 2y -z = 9
    2x + y = 4
    x + 2y - 2z = 2