Can somebody help me on 10 & 12

If f(x) = 6x – 4, what is f(x) when x = 8? a2 b16 c44 d52

Which one is the correct answer, and why?

In which quadrant does the point lie? write the coordinates of the point. a. quadrant ii; (–2, –4) b. quadrant iii; (2, 4) c. quadrant iii; (–2, –4) d. quadrant iv; (–4, –2)