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elena55 [62]
3 years ago
5

Which ordered pairs are solutions to the inequality x+3y≥−8? Select each correct answer.

Mathematics
2 answers:
valentinak56 [21]3 years ago
6 0

Answer:

A. (-1,-2)

D. (-6,0)

E. (-5,-1)

Step-by-step explanation:

We have been given an inequality x+3y\geq -8. We are asked to find the ordered pairs that are solution to the given inequality.

Let us check each ordered pair by substituting in the given inequality.

A. (-1,-2)

-1+3(-2)\geq -8

-1-6\geq -8

-7\geq -8

Since the given inequality holds true, therefore, ordered pair (-1,-2) is a solution for the inequality.

B. (-16,2)

-16+3(2)\geq -8

-16+6\geq -8

-10\geq -8

Since the given inequality is not true, therefore, ordered pair (-16,2) is not solution for the inequality.

C. (0,-3)

0+3(-3)\geq -8

0-9\geq -8

-9\geq -8

Since the given inequality is not true, therefore, ordered pair (0,-3) is not solution for the inequality.

D. (-6,0)

-6+3(0)\geq -8

-6+0\geq -8

-6\geq -8

Since the given inequality holds true, therefore, ordered pair (-6,0) is a solution for the inequality.

E. (-5,-1)

-5+3(-1)\geq -8

-5-3\geq -8

-8\geq -8

Since the given inequality holds true, therefore, ordered pair (-5,-1) is a solution for the inequality.

andre [41]3 years ago
3 0
<span>x+3.y≥−8

Let x </span>≥ -5 And y ≥ -1 , Then:

(-5) + 3(-1) ≥ -8  . The solution is (-5 , -1)
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Answer:

540°

General Formulas and Concepts:

<u>Math</u>

  • Counting

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Geometry</u>

  • Sum of Angles: 180(n - 2)°

Step-by-step explanation:

<u>Step 1: Define</u>

We are given a 5-sided polygon (irregular pentagon)

n = 5

<u>Step 2: Find Sum</u>

  1. Substitute in <em>n</em> [Sum of Angles]:                                                                    180(5 - 2)°
  2. (Parenthesis) Subtract:                                                                                   180(3)°
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Using a discrete probability distribution, it is found that:

a) There is a 0.3 = 30% probability that he will mow exactly 2 lawns on a randomly selected day.

b) There is a 0.8 = 80% probability that he will mow at least 1 lawn on a randomly selected day.

c) The expected value is of 1.3 lawns mowed on a randomly selected day.

<h3>What is the discrete probability distribution?</h3>

Researching the problem on the internet, it is found that the distribution for the number of lawns mowed on a randomly selected dayis given by:

  • P(X = 0) = 0.2.
  • P(X = 1) = 0.4.
  • P(X = 2) = 0.3.
  • P(X = 3) = 0.1.

Item a:

P(X = 2) = 0.3, hence, there is a 0.3 = 30% probability that he will mow exactly 2 lawns on a randomly selected day.

Item b:

P(X \geq 1) = 1 - P(X = 0) = 1 - 0.2 = 0.8

There is a 0.8 = 80% probability that he will mow at least 1 lawn on a randomly selected day.

Item c:

The expected value of a discrete distribution is given by the <u>sum of each value multiplied by it's respective probability</u>, hence:

E(X) = 0(0.2) + 1(0.4) + 2(0.3) + 3(0.1) = 1.3.

The expected value is of 1.3 lawns mowed on a randomly selected day.

More can be learned about discrete probability distributions at brainly.com/question/24855677

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