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a large cheese pizza costs $7.50. Each additional topping for the pizza costs $1.35. if the total bill for the pizza sally ordered was $12.90, how many toppings did she order? and write an equation to model the situation, then solve.

Respuesta :

dexteright02
Data:

Pt (pizza+topping) = $7.50
t (topping) = $1.35
tt (total) = $12.90
nt (number topping) = ?

Solving:

[tex]pt + t*nt = tt (equation) [/tex]

[tex]7.50 + 1.35nt = 12.90[/tex]
[tex]1.35nt = 12.90 - 7.50[/tex]
[tex]1.35nt = 5.4[/tex]
[tex]nt = \frac{5.4}{1.35} [/tex]
[tex]\boxed{nt = 4}[/tex]

For better understanding

Data:

A (pizza+topping) = $7.50
B (topping) = $1.35
C (total) = $12.90
D (number topping) = ?

Solving:

[tex]A + B*C = D (equation) [/tex]

[tex]7.50 + 1.35D = 12.90[/tex]
[tex]1.35D = 12.90 - 7.50[/tex]
[tex]1.35D = 5.4[/tex]
[tex]D = \frac{5.4}{1.35} [/tex]
[tex]\boxed{D = 4}[/tex]

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