Acity of 82,080 residents has a population density of 2,160 residents per square mile what is the area of the city

This question awards 100 ! i really don’t want to fail i will also mark you !

Identify the expression equivalent to 4(x + x + 7) − 2x + 8 − 4 by substituting x = 1 and x = 2.

Norder to get a certain shade of blue paint, a mixer must have 5 parts white paint to 3 parts blue. if 4 gallons of paint must be mixed, how many gallons of white paint must be used?