11.1 Functions

A pizzeria charges $12 per pizza plus an additional $3 for delivery. Which equation represents the cost of having any number of pizzas delivered?

• c = 12p + 3

• c = 12p

• c = 3p

• c = 12 + 3p

Answer explanation

The correct equation is c = 12p + 3 because the cost of each pizza is $12 and there is an additional $3 for delivery, making the total cost dependent on the number of pizzas ordered.

If a pizzeria charges $10 per pizza plus an additional $2 for delivery, which equation represents the cost of having any number of pizzas delivered?

• c = 10p + 2

• c = 10p

• c = 2p

• c = 10 + 2p

Answer explanation

The correct equation is c = 10p + 2 because the cost of each pizza is $10 and there is an additional $2 for delivery, which is added to the total cost.

A bakery charges $5 per cake plus an additional $1 for delivery. Which equation represents the cost of having any number of cakes delivered?

• c = 5c + 1

• c = 5c

• c = c

• c = 5 + c

Answer explanation

Choose the equation with the correct representation of cost: c = 5c + 1, where c is the number of cakes and 5 is the cost per cake with an additional $1 for delivery.

A coffee shop charges $3 per coffee plus an additional $0.50 for delivery. Which equation represents the cost of having any number of coffees delivered?

• c = 3c + 0.50

• c = 3c

• c = 0.50c

• c = 3 + 0.50c

Answer explanation

The correct equation is c = 3c + 0.50 because the cost of each coffee is $3 and there is an additional $0.50 for delivery, which is added to the total cost.

If a sandwich shop charges $8 per sandwich plus an additional $1.50 for delivery, which equation represents the cost of having any number of sandwiches delivered?

• c = 8s + 1.50

• c = 8s

• c = 1.50s

• c = 8 + 1.50s

Answer explanation

The correct equation is c = 8s + 1.50 because it includes the cost of each sandwich ($8s) and the delivery fee ($1.50).

A grocery store charges $20 per bag of groceries plus an additional $5 for delivery. Which equation represents the cost of having any number of bags of groceries delivered?

• c = 20b + 5

• c = 20b

• c = 5b

• c = 20 + 5b

Answer explanation

The correct equation is c = 20b + 5 because the cost per bag is $20 and there is an additional $5 for delivery, making it a total of 20b + 5.

A flower shop charges $15 per bouquet plus an additional $2 for delivery. Which equation represents the cost of having any number of bouquets delivered?

• c = 15b + 2

• c = 15b

• c = 2b

• c = 15 + 2b

Answer explanation

The correct equation is c = 15b + 2 because the cost includes $15 per bouquet (15b) and an additional $2 for delivery.

If a burger joint charges $5 per burger plus an additional $1.50 for delivery, which equation represents the cost of having any number of burgers delivered?

• c = 5b + 1.50

• c = 5b

• c = 1.50b

• c = 5 + 1.50b

Answer explanation

The correct equation is c = 5b + 1.50 because it includes the cost of each burger ($5 per burger) and the delivery fee ($1.50).

A taco truck charges $7 per taco plus an additional $2 for delivery. Which equation represents the cost of having any number of tacos delivered?

• c = 7t + 2

• c = 7t

• c = 2t

• c = 7 + 2t

Answer explanation

The correct equation should include the cost of tacos ($7 per taco) and the delivery fee ($2), so c = 7t + 2 is the right choice.

A juice bar charges $4 per smoothie plus an additional $1 for delivery. Which equation represents the cost of having any number of smoothies delivered?

• c = 4s + 1

• c = 4s

• c = s

• c = 4 + s

Answer explanation

The correct equation is c = 4s + 1 because each smoothie costs $4 and there is an additional $1 for delivery.