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Mary and Roberto go to the movies. They buy a large popcorn for $8.50, and two medium sodas for $4.25. How much did they spend altogether, if there was a 7.89% tax? Create two equations to solve

Respuesta :

2018bbenzenhafe

Answer:

$19.15

Step-by-step explanation:

Equation 1: 8.50+4.25+4.25= 17.00  (price of the popcorn and drinks)

Equation 2: 17.00/7.89= 2.15                       (how to find how much the tax is)

Solve: 17.00+2.15=19.15                     (add the tax to how much the popcorn and drinks were)

The tax is used to multiply and then added to the total amount Mary and

Roberto spends at the movies.

Response:

  • The amount Mary and Roberto spend is; $18.3413

Which method is used to calculate the total amount spent?

The given parameters are;

Price of the large popcorn = $8.50

Price of the two medium sodas = $4.25

Percentage of total paid as tax = 7.89%

Let p represent the price of the popcorn, let s represent the price of a

soda, and let t represent the tax we have;

First equation;

  • Total cost of items purchased = p + 2·s

Second equation;

  • The amount paid as tax = t·(p + 2·s)

Total amount spent = p + 2·s + t·(p + 2·s)

Where;

p = $8.50, s = $4.25, and t = 0.0789

By plugging in the above values, gives;

The total amount spent = 8.50 + 2 × 4.25 + 0.0789 × (8.50 + 2 × 4.25) = 18.3413

  • The total amount they spend = $18.3413

Learn more about applying tax rate here:

https://brainly.com/question/186640

https://brainly.com/question/25897508

https://brainly.com/question/25028592

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