Few math questions

I’m working on a Mathematics question and need guidance to help me study.

1. Given the function

LaTeX: fleft(xright)=4x^{2:}-14x-96

what is the x value of the vertex?

2. Given the function

LaTeX: fleft(xright)=4x^{2:}-14x-96

what is the root with the smallest value?

3. Given the function

LaTeX: fleft(xright)=4x^{2:}-14x-96

what is the root with the largest value?

4. Given the two points (2,3) and (5,7), what is the y-intercept of the line?

5. Given that LaTeX: TRleft(xright)=20x

and LaTeX: TCleft(xright)=120+10x

what is the break-even point?