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damaskus [11]
3 years ago
6

Select the correct answer. Which statement is true about this quadratic equation? y=2x^2 + 9x-12 a There is one complex solution

b there are two complex solutions c There is one real solution d There are two real solutions​

Mathematics
1 answer:
Yakvenalex [24]3 years ago
5 0

Answer:

There are 2 complex solutions

Step-by-step explanation:

Both imaginary Solutions

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The equation of a line that goes through the point (x1,y1) and has a slope of m is
y-y1=m(x-x1)

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y-8=m(x-(-2))
y-8=m(x+2)
the equation is y-8=m(x+2) where m is the slope
or you could rewrite it to get y=mx+2m+8

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What is 10 inches to 1 yard for ratios
Lostsunrise [7]

Answer:

the answer is 10:1

Step-by-step explanation:

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Lapatulllka [165]

Answer:

y = -5

Step-by-step explanation:

<em>-</em><em>7</em> = <em>y </em><em>-</em><em>2</em><em> </em>

<em>y </em><em>=</em><em> </em><em>-</em><em>7</em><em> </em><em>+</em><em>2</em>

<em>y </em><em>=</em><em> </em><em>-</em><em> </em><em>5</em><em> </em>

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7 0
2 years ago
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Anna has been adding $30 to her savings account every month. Which model could represent the money in Anna’s savings account (y)
RSB [31]

Y=30x.
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3 years ago
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In preparation for an earnings report, a large retailer wants to estimate p= the proportion of annual sales
mr Goodwill [35]

Using the z-distribution, it is found that the 95% confidence interval for the proportion of sales that occured in December is (0.1648, 0.2948).

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which:

  • \pi is the sample proportion.
  • z is the critical value.
  • n is the sample size.

In this problem, we have a 95% confidence level, hence\alpha = 0.95, z is the value of Z that has a p-value of \frac{1+0.95}{2} = 0.975, so the critical value is z = 1.96.

The sample size and the estimate are given by:

n = 161, \pi = \frac{37}{161} = 0.2298

Hence:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2298 - 1.96\sqrt{\frac{0.2298(0.7702)}{161}} = 0.1648

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2298 + 1.96\sqrt{\frac{0.2298(0.7702)}{161}} = 0.2948

The 95% confidence interval for the proportion of sales that occured in December is (0.1648, 0.2948).

More can be learned about the z-distribution at brainly.com/question/25890103

5 0
2 years ago
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