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ruslelena [56]
3 years ago
8

2. a. A fish is 12 meters below the surface of the ocean. What is its elevation?

Mathematics
2 answers:
lana [24]3 years ago
7 0
<h3><em>Answer:</em></h3><h3><em>40</em></h3><h3><em>Step-by-step explanation:</em></h3><h3><em>The surface of the ocean would be 0.</em></h3><h3><em></em></h3><h3><em>Taking this into account, 12 meters below would be 0 - 12, which is -12. Therefore A's elevation would be -12.</em></h3><h3><em></em></h3><h3><em>For the sea bird, 28 meters above the surface, which is again 0, would be 0 + 28. B's elevation is 28.</em></h3><h3><em></em></h3><h3><em>Since the fish is 12 meters below the surface and the sea bird is 28 meters above the surface, simply add the two numbers up to get a total of 40 meters. C would be 40 meters.</em></h3>

<em></em>

Alex17521 [72]3 years ago
5 0

Answer:

A. -12 meters

B. 28 meters

C. 40 meters

Step-by-step explanation:

The surface of the ocean would be 0.

Taking this into account, 12 meters below would be 0 - 12, which is -12. Therefore A's elevation would be -12.

For the sea bird, 28 meters above the surface, which is again 0, would be 0 + 28. B's elevation is 28.

Since the fish is 12 meters below the surface and the sea bird is 28 meters above the surface, simply add the two numbers up to get a total of 40 meters. C would be 40 meters.

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Using a system of equations, it is found that the unit prices are:

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For the system:

  • x is the unit price of a bag of chips.
  • y is the unit price of liter of pop.
  • z is the unit price for a chocolate bar.

From the table, the equations are:

2x + 2y + z = 9.25

3x + 4y + z = 14.50

x + 3y + 3z = 12

Replacing the <u>first equation on the second and the third:</u>

z = 9.25 - 2x - 2y

3x + 4y + z = 14.50

3x + 4y + 9.25 - 2x - 2y = 14.50

x + 2y = 5.25

x = 5.25 - 2y

x + 3y + 3z = 12

x + 3y + 3(9.25 - 2x - 2y) = 12

-5x - 3y = -15.75

5x + 3y = 15.75

Since x = 5.25 - 2y:

5(5.25 - 2y) + 3y = 15.75

-7y = -10.5

y = \frac{10.5}{7}

y = 1.5

Then:

x = 5.25 - 2y = 5.25 - 2(1.5) = 2.25

z = 9.25 - 2x - 2y = 9.25 - 2(2.25) - 2(1.5) = 1.75

The unit prices are:

  • $2.25 for a bag of chips.
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A similar problem, also solved using a system of equations, is given at brainly.com/question/14183076

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Answer:

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Step-by-step explanation:

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Next we need to find c. Since we know a point the line must intersect, we can sub this into our line equation to get an answer:

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