what is your current quant and verbal scores and goal? if inequalities, absolute value, and coordinate geometry are the only areas bothering you then you may be well off i suppose. Inequalities you have to remember that if you divide or multiply negatives you have to change signs and also you shouldnt divide variables since they *may* be negative and might mess you up unless question specifically states the variable being positive. For absolute value you should always plug in negative values whenever possible since most absolute questions is dependent on the negation of the sign. Coordinate geometry doesnt seem to appear that often but you should know:
slope : y=mx+b rise/run y2-y1/x2-x1
perpendicular = negative of the reciprocal of the slope so perp of 4/5 is -5/4
parallel the slope is the same BUT the b is different.
also know your mid points and distance as well...