You are going to the fair and have $16 to spend on rides and games. ride tickets cost $4 and game tickets cost $2. the equation 4x+2y=16 models this situation, where x is the number of ride tickets you buy and y is the number of game tickets you buy.

Ben frank is an electrician who installs lighting fixtures. he charges (in dollars) his clients 15h+40f15h+40f where hh is the number of hours worked and ff is the number of fixtures installed. how much does ben frank charge when he works 77 hours and installs 99 fixtures?