Ok this is the final one. can someone help

What are the sotions to the quadratic equation 9x^2=4

Which system of linear inequalities is represented by the graph? x-3y > 6 and y? 2x + 4 x + 3y > 6 and y? 2x - 4 x - 3y > 6 and y? 2 - 4 x + 3y > 6 and y > 2x + 4 no be 2 -1.1 1 2 3 4 5 submit save and exit next mark this and retum be

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1