Question

3. A resturaunt sells two kinds of meals: pizza and pasta. A pizza costs $14 and a pasta costs $10. In a single day the resturaunt sold 79 meals. If they earned $994 on this day, how many of each meal was sold?

Answer 1

Respuesta:

51 pizzas and 28 pastas.

Explicación paso a paso:

Pizza = $14.00    (The amount of pizza is x)

Pasta = $10.00   (The amount of pasta is y)

x + y = 79             (-10)

14x + 10y = 994

- 10x - 10y = - 790

14x + 10y = 994

-10x + 14x - 10y + 10y = -790 + 994

4x = 204

x = 51 meals

x + y = 79

51 + y = 79

y = 79 - 51

y = 28 meals

*COMPROBATION*

Equation number 1 :

x + y = 79

51 meals + 28 meals = 79 meals

79 meals = 79 meals   :)

Equation number 2:

14x + 10y = 994

14(51 meals) + 10(28meals) = $994

$714 + $280 = $994   :)

Answer 2

Respuesta:

no se lo voy a valer por copiarse jajajaj

Explicación paso a paso: