Yes, that's it! I literally just put it on imgur as well. Thanks for that.

So I realized that the resistors are "pulldown" resistors. What's the problem with leaving them floating or unconnected?

As for the PMOS, here are the equations:

PMOS Equation SheetI read about the LED driver and I guess it uses a current mirror to draw a constant current. And the mistake I made is that I ignored Vds (Vgs is set 5V). But nevertheless, why are none of the parameters used to calculate the currents/voltages through/across the MOSFET given in any of the data sheets for any MOSFET (I've looked at a couple other transistors and they didn't have ratios or anything either). ATM my goal is to solve for Vds. That is, I have current (by the LED driver), and Vgs, and I want to calculate Vds to check that my LEDs will turn on.