Simplify: 5x+9y-7x+2-5y-7x+2-3x

please help

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

The population of a small rural town in the year 2006 was 2,459. the population can be modeled by the function below, where f(x residents and t is the number of years elapsed since 2006. f(t) = 2,459(0.92)

If a line is defined by the equation y = 5x + 2, what is the slope?