2-7 practice Parallel lines and transversals

Ican figure out 20 shares multiply by $117.98 =2359.6920 shares multiply by $124.32=2486.40then take 40 shares multiply by $128.48=5139.20after that i'm lost any be greatly appreciated.

Find the maximum value of p= 4x + 5y subject to the following constraints :

Which point-slope form equation represents a line that passes through (3,-2) with a slope of -4/5