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Anika [276]
2 years ago
8

With tax included, a couch costs $315. What does the couch cost before tax?

Mathematics
1 answer:
Orlov [11]2 years ago
4 0

The $315 cost of the couch after tax, gives the cost before tax, <em>C</em>, as the following equation;

Cost \: before \: tax, \: \:  \mathbf {C} =  \frac{315}{1 + t}

<h3>How can the cost before tax be expressed?</h3>

The cost of the couch with tax = $315

Let, <em>t</em>, represent the tax rate, and let <em>C</em>, represent the cost before tax, we have;

315 = C + C × t

  • 315 = C × (1 + t)

Which gives;

  • The cost of the couch before tax, <em>C </em>= 315/(1 + t)

Mathematically, we have the following equation;

Cost \: before \: tax, \: \:  \mathbf {C} =  \frac{315}{1 + t}

Learn more about writing, and analyzing equations here:

brainly.com/question/7187454

#SPJ1

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Circle A has center (0, 0) and radius 3. Circle B has center (-5, 0) and radius 1. What sequence of transformations could be use
Dmitrij [34]

A translation of T(x, y) = (- 5, 2) and a dilation with center (- 5, 2) with a scale factor of 1 / 3 are necessary to transform circle A into circle B. (Correct choice: D)

<h3>What sequence of rigid transformations can be done on a circle</h3>

In this problem we must determine the sequence of transformations require to transform circle A into circle B. From analytical geometry we know that the equation of the circle in standard form is:

(x - h)² + (y - k)² = r²

Where:

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  • r - Radius of the circle.

Then, we need to apply the following rigid transformations:

Translation

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Dilation with center at the center of the circle

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The circle A is represented by x² + y² = 3, then we derive the expression for the circle B:

f(x, y) → f(x + 5, y - 2)

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Lerok [7]

Answer:$90,000

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