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DENIUS [597]
3 years ago
7

Solve following | 2x + 9 = 15

Mathematics
1 answer:
vivado [14]3 years ago
4 0
  • Answer:

<em>x₁ = 3</em>

<em>x₂ = - 12</em>

  • Step-by-step explanation:

<em>Hi there ! </em>

<em>| 2x + 9 | = 15</em>

<em>1.</em>

<em>2x + 9 = 15</em>

<em>2x = 15 - 9</em>

<em>2x = 6</em>

<em>x = 6 : 2</em>

<em>x₁ = 3</em>

<em>2.</em>

<em>2x + 9 = - 15</em>

<em>2x = - 15 - 9</em>

<em>2x = - 24</em>

<em>x = - 24 : 2</em>

<em>x₂ = - 12</em>

<em>Good luck ! </em>

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Step-by-step explanation:

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z=\dfrac{5-15.45}{13.70}=-0.7627737226\approx-0.76

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The length of one side of a triangle is 2 feet less than three times the length of its second side. The length of the third side
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Answer:

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Step-by-step explanation:

Let the sides be a, b and c.

<h3>Given</h3>

The length of one side of a triangle is 2 feet less than three times the length of its second side

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The length of the third side is 3/4 of the sum of the lengths of the first two sides:

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The perimeter of the triangle is 17.5 feet:

  • a + b + c = 17.5

<h3>Solution</h3>

Substitute a with b in the second equation:

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Now substitute a and c with b in the third equation and solve for b:

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Find the value of a:

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Find the value of c:

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The sides of the triangle are:

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