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attashe74 [19]
3 years ago
5

Roscoe's family has dinner at a restaurant. The total cost is $103.80. This includes 5% tax and 15% tip on the ore tax amount. H

ow much was the bill before tax and tip?
Mathematics
1 answer:
Anni [7]3 years ago
5 0

Answer:

  $86.50

Step-by-step explanation:

Let b represent the bill before tax and tip. Then the total is ...

  b + 0.05b + 0.15b = 103.80

  b(1.20) = 103.80 . . . . . . . . . . collect terms

  b = 103.80/1.20 = 86.50 . . . divide by the coefficient of b

The bill before tax and tip was $86.50.

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Answer:

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Step-by-step explanation:

Samples may be classified as:

Convenient: Sample drawn from a conveniently available pool.

Random: Basically, put all the options into a hat and drawn some of them.

Systematic: Every kth element is taken. For example, you want to survey something on the street, you interview every 5th person, for example.

Cluster: Divides population into groups, called clusters, and each element in the cluster is surveyed.

Stratified: Also divides the population into groups. However, then only some elements of the group are surveyed.

Situation a:

Asks all from a single group(sitting passengers), that is, convenint sample.

Situation b:

First she separates the students by row, then from each row, she chooses all students. So this is Cluster sampling.

Situation c:

The manager separates the stores by location, and then in each location, random customers are chosen. This is an example of Stratified sampling.

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Marks for every fourth patron, that is, every 4th element. So Systematic sampling.

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What is the solution to the equation 13.7y = 6.2y + 30?
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Here, we are required to determine the solution to the equation: 13.7y = 6.2y + 30?

The solution to the equation is y = 7.5

The solution is thus,

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Therefore, y = 30/7.5 = 4

Therefore, y = 4 is the solution to the equation.

Read more:

brainly.com/question/12184348

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