Pl hell
a) 20a³-20a²+5a=?
b) -9x²+6x-1=?
c) -12a²+24ma-12m²=?​

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?