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timofeeve [1]
3 years ago
5

Which complex number is represented by the graph

Mathematics
1 answer:
Dmitrij [34]3 years ago
4 0

Answer:

3-4i

Step-by-step explanation:

The x-axis represents x and x is 3. The y-axis represents iy and y is -4 so iy is -4i.

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Find the discriminant and the number of real roots for the equation.<br><br> 4x^2+12x+9=0
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Step-by-step explanation:

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Suppose you ride your bicycle to the library traveling at 0.50km/min. It takes you 25 minutes to get to the library. How far did
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I need need help on this
Crazy boy [7]

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points A, B and D are all in the same plane but not all are on the same line

Step-by-step explanation:

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3 years ago
The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the e
marusya05 [52]

Answer:

The estimation for the proportion of tenth graders reading at or below the eighth grade level is given by:

\hat p =\frac{955-812}{955}= 0.150

0.150 - 1.64 \sqrt{\frac{0.150(1-0.150)}{955}}=0.131

0.150 + 1.64 \sqrt{\frac{0.150(1-0.150)}{955}}=0.169

And the 90% confidence interval would be given (0.131;0.169).

Step-by-step explanation:

We have the following info given:

n= 955 represent the sampel size slected

x = 812 number of students who read above the eighth grade level

The estimation for the proportion of tenth graders reading at or below the eighth grade level is given by:

\hat p =\frac{955-812}{955}= 0.150

The confidence interval for the proportion  would be given by this formula

\hat p \pm z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}

For the 90% confidence interval the significance is \alpha=1-0.9=0.1 and \alpha/2=0.05, with that value we can find the quantile required for the interval in the normal standard distribution and we got.

z_{\alpha/2}=1.64

And replacing into the confidence interval formula we got:

0.150 - 1.64 \sqrt{\frac{0.150(1-0.150)}{955}}=0.131

0.150 + 1.64 \sqrt{\frac{0.150(1-0.150)}{955}}=0.169

And the 90% confidence interval would be given (0.131;0.169).

8 0
3 years ago
A mixed number always consists of a _____ number plus a fraction.
Aleks [24]

Answer:

whole number and a fraction

8 0
3 years ago
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