Find the point where the lines intersect: y = 3x and y = x + 16 A: (8,24)
B: (4,12)
C: (4,20)
D: (0,0)

Ineed me i stuck and i don’t want to get it wrong

The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2

Which is the focus of a parabola with equation y2=4x