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jonny [76]
3 years ago
10

Elena's cousins went to a restaurant. The part of the entire cost of the meal that was tax and tip together was 25% of the cost

of the food alone. What could the tax rate and tip rate be?
Mathematics
1 answer:
garri49 [273]3 years ago
6 0
The tax rate could be 5% as we usually pay for our tax rate in our food and 20% could be the tip rate
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Read 2 more answers
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Can you please explain this?​
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Answer:

The question is giving you pairs of points in space which can be used to define lines. It is then asking you to determine if the lines defined by those points are parallel, perpendicular, or neither.

Step-by-step explanation:

Two key things you need to know to solve this is that the lines will be parallel if their slopes are the same, and perpendicular if one slope is the negative reciprocal of the other (i.e. s_{1} = -s_{2}^{-1})

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s = \Delta y / \Delta x\\s = \frac{5 - 1}{3 - 1}\\s = 4/2\\s = 2

So the first pair of vectors describe a line with a slope of 2.  Let's look at the other pair:

s = \Delta y / \Delta x\\s = (12 - 2) / (5 - 0)\\s = 10 / 5\\s = 2

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