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MissTica
3 years ago
8

Lacey is in town on a business trip. She orders a sandwich, chips and a milkshake, which comes to $12.25. She is pleased with th

e food and service and is impressed that they have free Wi‐Fi, so she can work on her laptop. She decides to leave an 18% tip. How much of a tip will they leave and how much is their total?
Mathematics
1 answer:
Klio2033 [76]3 years ago
4 0

Answer:

They will leave a $2.205 tip (rounds to $2.21), therefore their total is $14.455 (rounded to $14.46).

Step-by-step explanation:

18% of $12.25 is $2.205, which gets rounded to $2.21. Their total consist of the original cost ($12.25) and the rounded tip ($2.21): $12.25+$2.21=$14.46

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Answer: the current of the river is 3 mph.

Step-by-step explanation:

Let x represent the current of the river.

The boat travels 2.4 miles downstream. Assuming it travelled with the current of the river. If the boat travels at an average speed of 21 miles per hour in the still water, it means that the total speed at which the boat travelled downstream is

(21 + x) mph

Time = distance/speed

Time taken to travel downstream is

2.4/(21 + x)

it travels 1.8 miles upstream. Assuming it travelled against the current of the river. it means that the total speed at which the boat travelled upstream is

(21 - x) mph

Time taken to travel upstream is

1.8/(21 - x)

Since the time taken to travel upstream and downstream is the same, then

2.4/(21 + x) = 1.8/(21 - x)

Cross multiplying, it becomes

2.4(21 - x) = 1.8(21 + x)

50.4 - 2.4x = 37.8 + 1.8x

2.4x + 1.8x = 50.4 - 37.8

4.2x = 12.6

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7 0
3 years ago
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Simplify radical of 27
olga55 [171]
Yo mean sqrt 27 or √27

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8 0
4 years ago
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3 years ago
A. Download the printable diagram of the real number system. B. Find 10 numbers in the real world, with at least one number from
Ksju [112]

Answer:

Natural Number: 1, 2, 3

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Step-by-step explanation:

8th grade k-12 xx

8 0
3 years ago
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<span>Let the wall's length be y. So the fence parallel is also y.

We form the equation;
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We have 2 equations with 2 variables. Solve them and get the answer.

xy = 5500
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