To rent a bike, it costs $20 down and $10 per hour as modeled by this equation: y = 10x + 20. If you rent the bike for 5 hours, how much money will it cost?

(a)  

Shyla is designing a calendar. It costs $500 to print, plus $2.50 per calendar, as modeled by this equation: y = 2.50x + 500. If she sells 100 calendars, how much money will it cost her to make the calendars?

(a)  

Kim and Cyndi charge $40 per hour to tutor math students. They pay $400 per month for their office space, so their profit per month can be modeled by this equation: y = 40x - 400. If they tutor for 150 hours per month, how much money will they make?

(a)  

To rent a car, it costs $100 down and $0.10 cents per mile driven, as modeled by this equation: y = 0.10x + 100. If you travel 300 miles, how much will it cost to rent the car?

(a)  

For John's roof repair business, he buys a truck for $30,000. If each roof he fixes earns him $3,000, we can model his profit by this equation: y = 3000x - 30000. How many jobs will it take for him to pay off his truck? (Hint: Set y equal to zero and solve for x)

(a)  

To go to the carnival, you pay $6 to get in, and $2 per ride, as shown by this equation: y = 2x + 6. If you only have $30 to spend, how many rides can you go on? (Hint: set y equal to 30, and solve for x)

(a)  

A container has 50 gallons of water and is draining at a rate of 1 gallon per hour, as modeled by this equation: y = -1x + 50. How many hours will it take for the container to have 5 gallons left?

(a)  

An airplane is at 25,000 feet in the air and is descending at a rate of 1,000 feet per minute, as modeled by this equation: y = -1000x + 25,000. What will the plane's elevation be after 15 minutes?

(a)  

A tree is 3 feet tall. It grows .5 feet every month, as modeled by this equation: y = .5x + 3. After 6 months, how tall will the tree be?

(a)