Order the following from greatest to least -12, 12, -19, 1 1/2(BTW this is a mixed number ;-; ) , 5

PLEASE HELP ME

5x−4≥12 or 12x+5≤−4 can you with this problem

If the value of cos330°is√3/2 then find cos 165°.

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /