Find the value of x in the following parallelogram

What is the standard form of -5x^2+2x^4-11+x^3+3x

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

An appliance store sells lamps at $95.00 for two. a department store sells similar lamps at 5 for $250.00. which store sells at a better rate