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3 years ago

Which of these is the graph of −2−3i ?

Mathematics

1 answer:

Sav [38]3 years ago

3 0

Answer:

-2-3i in the complex plane would be 2 units to the right of the origin and

3 units below the Real number line.

Step-by-step explanation:

Think of the complex plane as being the Cartesian plane but with the X-axis replaced by the Real component of a complex number and the Y-axis replaced by the imaginary component.

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A group of 59 randomly selected students have a mean score of 29.5 with a standard

algol [13]

Answer:

$29.5-1.671\frac{5.2}{\sqrt{59}}=28.37$

$29.5+1.671\frac{5.2}{\sqrt{59}}=30.63$

And we can conclude that the true mean for the scores are given by this interval (28.37; 30.63) at 90% of confidence

Step-by-step explanation:

Information given

$\bar X = 29.5$ represent the sample mean

$\mu$ population mean

s= 5.2 represent the sample standard deviation

n=59 represent the sample size

Confidence interval

The confidence interval for the true mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom are given by:

$df=n-1=59-1=58$

The Confidence interval is 0.90 or 90%, the significance is $\alpha=0.1$ and $\alpha/2 =0.05$ , and the critical value is $t_{\alpha/2}=1.671$

Now we have everything in order to replace into formula (1):

$29.5-1.671\frac{5.2}{\sqrt{59}}=28.37$

$29.5+1.671\frac{5.2}{\sqrt{59}}=30.63$

And we can conclude that the true mean for the scores are given by this interval (28.37; 30.63) at 90% of confidence

8 0

2 years ago

Allen needs to prepare a compound for the patient to pick up tomorrow. He needs to mix of drug A, with of drug B and of drug C.

Phoenix [80]

Answer:

76/15

Step-by-step explanation:

Add the drug combinations together

Drug A + B + C=2/5 + 5/3 + 9/3

The L.C.M of the denominators is 15

=6+25+45/15

=76/15

=5 1/15

Allen needs to prepare 76/15 compound for the patient

5 0

3 years ago

Jasmine is planting flowers at her house. She really likes daisies. Jasmine has a budget of no more than $50 to spend on flowers

egoroff_w [7]

She can buy 20 flower

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3 years ago

What is the simplest form of 50/8?

lions [1.4K]

6 1/4 or 6.25 or 25/4

3 0

3 years ago

Read 2 more answers

What is the quotient a-3/7÷3-a/21

Airida [17]

I wish you were using parentheses here. I must assume (without knowing for sure) that y ou mean

a - 3/7
----------
3 - a/21

The LCD here is 21, since 7 divides into 21 without a remainder.

Thus, multiply numerator and denominator by 21:

21a - 9
-----------
63 - a

You could leave this result as is, or you could factor out 3:

7a-3
3 ---------
63-a

3 0

3 years ago

Read 2 more answers