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Ostrovityanka [42]
3 years ago
10

Does soil filled with nitrogen increase the weight of worms compared with soil without nitrogen? The weight of 12 randomly selec

ted worms is acquired, six in soil with nitrogen and six in soil without nitrogen. The mean weight of worms in soil with nitrogen was 41.3 micrograms whereas the mean weight of worms in soil without nitrogen was 38.9 micrograms. A researcher randomized the data over 100 trials, and the difference of means for each trial is shown in the dot plot below
Mathematics
1 answer:
weqwewe [10]3 years ago
3 0
Nitrogen does make the weight increase based on the given information
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Simplify <br> 6sqrt20 + 8sqrt5 – 5sqrt45
lukranit [14]

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  • 5√5

Step-by-step explanation:

<u>Simplify</u>

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3 years ago
BCDE is a rectangle.
anastassius [24]

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x = 220°

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8 0
3 years ago
Use the discriminant to describe the roots of each equation. Then select the best description.
Paha777 [63]

The <em>quadratic</em> equation 3 · x² + 7 · x - 2 = 0 has a <em>positive</em> discriminant. Thus, the expression has two <em>distinct real</em> roots (<em>real</em> and <em>irrational</em> roots).

<h3>How to determine the characteristics of the roots of a quadratic equation by discriminant</h3>

Herein we have a <em>quadratic</em> equation of the form a · x² + b · x + c = 0, whose discriminant is:

d = b² - 4 · a · c     (1)

There are three possibilities:

  1. d < 0 - <em>conjugated complex</em> roots.
  2. d = 0 - <em>equal real</em> roots (real and rational root).
  3. d > 0 - <em>different real</em> roots (real and irrational root).

If we know that a = 3, b = 7 and c = - 2, then the discriminant is:

d = 7² - 4 · (3) · (- 2)

d = 49 + 24

d = 73

The <em>quadratic</em> equation 3 · x² + 7 · x - 2 = 0 has a <em>positive</em> discriminant. Thus, the expression has two <em>distinct real</em> roots (<em>real</em> and <em>irrational</em> roots).

To learn more on quadratic equations: brainly.com/question/2263981

#SPJ1

7 0
3 years ago
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