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Scorpion4ik [409]
2 years ago
7

The lengths of two sides of a triangle are shown. Side 1: 3x2 − 4x − 1 Side 2: 4x − x2 5 The perimeter of the triangle is 5x3 −

2x2 3x − 8. Part A: What is the total length of the two sides, 1 and 2, of the triangle? Show your work. (4 points) Part B: What is the length of the third side of the triangle? Show your work. (4 points) Part C: Do the answers for Part A and Part B show that the polynomials are closed under addition and subtraction? Justify your answer. (2 points).
Mathematics
1 answer:
sukhopar [10]2 years ago
4 0

The following results are;

  • The total length of the two sides is \rm 2x^2 + 4.
  • The length of the third side is \rm  y = 5x^3 -4x^2 + 3x -12.
  • Yes, Part A and Part B show that the polynomials are closed under addition and subtraction.
<h3>What is the triangle?</h3>

Triangle is a polygon that has three sides and three angles. The sum of the angle of the triangle is 180 degrees.

In a triangle, the sides and perimeter are given.

\rm Side\ 1: 3x^2 - 4x - 1 \\\\Side\ 2: - x^2 + 4x + 5\\\\Perimeter = 5x^3 - 2x^2 +3x - 8

a.  The total length of the two sides will be

\rm 3x^2 - 4x - 1 + (- x^2 + 4x + 5) \\\\\rm 3x^2 - 4x - 1 - x^2 + 4x + 5) \\\\2x^2 + 4

The total length of the two sides is \rm 2x^2 + 4.

b.  Then a length of the third side (y) will be

\rm 3x^2 - 4x - 1 + (- x^2 + 4x + 5) + y = 5x^3 - 2x^2 +3x - 8\\\\

On solving for y, we have

\rm y = 5x^3 - 2x^2 +3x - 8 -( 3x^2 - 4x - 1)  - (- x^2 + 4x + 5)\\\\y =  5x^3 - 2x^2 +3x - 8 - 3x^2 +4x + 1  + x^2 - 4x - 5\\\\ y = 5x^3 -4x^2 + 3x -12

The length of the third side is \rm  y = 5x^3 -4x^2 + 3x -12.

c.  Yes, Part A and Part B show that the polynomials are closed under addition and subtraction.

More about the triangle link is given below.

brainly.com/question/25813512

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Kayden is the youngest of four siblings whose ages are consecutive integers. if the sum of their ages is 90, find kayden's age.
NISA [10]

Based on the fact that Kayden is the youngest and their ages are consecutive and add up to 90, the Kayden is 21.

<h3>How old is Kayden?</h3>

To find Kayden's age, assume that it is x and use the formula:

90 = x + (x + 1) + (x +2) + (x +3)

Solving for x gives:

90 = 4x + 6

4x = 90 - 6

x = 84 / 4

x = 21

Find out more on solving for age at brainly.com/question/11757623

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6 0
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F(x) = -x^2+3 <br><br> find f(-2)
Fiesta28 [93]

f(x) = -x² + 3

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Answer → f(-2) = -1

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rewona [7]
I believe it would be -5.25
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Karo-lina-s [1.5K]

Answer:

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Step-by-step explanation:

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laiz [17]

Answer:

The answer is x>25/46

Step-by-step explanation:

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Move constant to the the right and change the sign. 138x>6+69.

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