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Lostsunrise [7]
1 year ago
13

Find the sum and choose the correct answer. 2n 3 + 4n 2 - 7 and -n 3 + 8n - 2

Mathematics
1 answer:
MrRa [10]1 year ago
6 0

The sum of the polynomials 2n³ + 4n² - 7 and -n³ + 8n - 2 will be n³ + 4n² + 8n - 9. Then the correct option is B.

<h3>What is polynomial?</h3>

A polynomial expression is an algebraic expression with variables and coefficients. Unknown variables are what they're termed. We can use addition, subtraction, and other mathematical operations. However, a variable is not divisible.

The polynomials are given below.

2n³ + 4n² - 7 and -n³ - 8n - 2

The sum of the polynomials will be

⇒ 2n³ + 4n² - 7 + (-n³ - 8n - 2)

⇒ 2n³ + 4n² - 7 - n³ - 8n - 2

⇒ n³ + 4n² - 8n - 9

The sum of the polynomials 2n³ + 4n² - 7 and -n³ + 8n - 2 will be n³ + 4n² - 8n - 9.

Then the correct option is B.

More about the polynomial link is given below.

brainly.com/question/17822016

#SPJ1

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EleoNora [17]

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Step-by-step explanation:

Given,

Time for lunch = 45 minutes

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Total = 45+45 = 90 minutes

This represents 18% of the total minutes Tim spend at school.

Let,

x be the total minutes Tim spend at school.

18% of x = 90 minutes

\frac{18}{100}x=90\\\\0.18x=90

Dividing both sides by 0.18

\frac{0.18x}{0.18}=\frac{90}{0.18}\\x=500

Tim spends 500 minutes at the school.

Keywords: percentage, division

Learn more about division at:

  • brainly.com/question/101683
  • brainly.com/question/103144

#LearnwithBrainly

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