Plz show work so I don’t fail this

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

Find the values of y: 3y^3(y^2+ 2/3y)=0

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2