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Amiraneli [1.4K]
3 years ago
15

Write (picture included) as a complex number in standard form.

Mathematics
1 answer:
vredina [299]3 years ago
6 0

Answer:

-9/4 -4i

Step-by-step explanation:

-3i + 3/4 + 2i -(3+ 3i)

The first step is to simplify the terms

-3i + 3/4 + 2i -(3+ 3i)

Now we distribute the negative sign

-3i + 3/4 + 2i -3- 3i

Now combine like terms

3/4 -3 -3i+2i -3i

-2 1/4 -4i

Change the mixed number to an improper fraction.

-(4*2+1)/4 -4i

-9/4 -4i

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A square is of length 15cm and area of 225cm² find its breadth ​
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Answer:

15

Step-by-step explanation:

Pls find attached picture

3 0
3 years ago
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Last Wednesday, a random sample of 24 students were surveyed to find how long it takes to walk from the Fretwell Building to the
Ray Of Light [21]

Answer:

E

Step-by-step explanation:

Solution:-

- We are to investigate the confidence interval of 95% for the population mean of walking times from Fretwell Building to the college of education building.

- The survey team took a sample of size n = 24 students and obtained the following results:

                Sample mean ( x^ ) = 12.3 mins

                Sample standard deviation ( s ) = 3.2 mins

- The sample taken was random and independent. We can assume normality of the sample.

- First we compute the critical value for the statistics.

- The z-distribution is a function of two inputs as follows:

  • Significance Level  ( α / 2 ) = ( 1 - CI ) / 2 = 0.05/2 = 0.025

Compute: z-critical = z_0.025 = +/- 1.96

- The confidence interval for the population mean ( u ) of  walking times is given below:

                      [ x^ - z-critical*s / √n  ,   x^ + z-critical*s / √n  ]

Answer:        [ 12.3 - 1.96*3.2 / √24  ,  12.3 + 1.96*3.2 / √24  ]

                   

3 0
3 years ago
Plz help me <br> WILL GIVE BRAINLIEST
Mkey [24]

Factor 3x^3−12x

3x^3−12x

=3x(x+2)(x−2)

Answer:

3x(x+2)(x−2)

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Which of the following would make the equation false? 42 ≥ 6p
OlgaM077 [116]

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this is true p=7

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p=5

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drek231 [11]
You need a circle graph
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