HELPPP PLS HELPP??

7x+8y=-18, 4x-9y=-3 solve the system of equations

The system of equations graphed below has how many solutions? y = 2x + 2

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0