Question

Can anyone help me with this?

Answer 1

Step-by-step explanation:

I assume delivery fee and service fee apply only once even if I order multiple pizzas in one order.

1.

y = 12x + 2.5 + 0.75 = 12x + 3.25

2.

y = 10x + 2.5 + 0.75 = 10x + 3.25

3.

I choose : $63.25

how many large pizzas ?

63.25 = 12x + 3.25

60 = 12x

x = 5

so I can order 5 large pizzas.

how many medium pizzas?

63.25 = 10x + 3.25

60 = 10x

x = 6

so, i can order 6 medium pizzas.

FYI : if the price is actually all 3 fees for each pizza ordered, then the formulas would look like this :

large pizzas :

y = (12 + 2.5 + 0.75)x = 15.25x

and for medium pizzas:

y = (10 + 2.5 + 0.75)x = 13.25x

and you could by for $63.25

63.25 = 15.25x

x = 63.25/15.25 = 4.147540984... ≈ 4 large pizzas

and

63.25 = 13.25x

x = 63.25/13.25 = 4.773584906... ≈ 4 medium pizzas

I assume we cannot buy part pizzas.