What adds to be -6 but multiplies to be 7?

Select all of the quadrants that the parabola whose equation is y=√x-4 (principal square root) occupies. i ii iii iv

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

How many real-number solutions does the equation have? -4x^2 + 10x + 6 = 0 a. no solutions b. two solutions c. infinitely many solutions d. one solution