What is the x-intercept of the graph that is shown below?

On a coordinate plane, a line goes through points (negative 2, 0) and (0, 4).
(–2, 0)
(–1, 2)
(0, 4)
(4, 0)

Use the discriminant to describe the roots of each equation. then select the best description. 2m2 + 3 = m double root real and rational roots real and irrational roots non-real roots

What’s the answer ? use the picture to see the problem

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.