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3 years ago

What is the inverse of -8+3i

Mathematics

2 answers:

Nuetrik [128]3 years ago

4 0

Answer:
8-3i
Explanation:
To find the inverse just reverse the sign of every term

enyata [817]3 years ago

3 0

Answer:

-8 - 3i

Step-by-step explanation:

To find the Complex Conjugate , Negate the term with i

Hopefully this helps.

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Please help! 27 points!<br> answer correctly!

VARVARA [1.3K]

For the first question the answer is C(n)=0.75n-0.25

for the second question the answer is y=2x

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3 years ago

Before any dinner service, the manager confirms when the number of reservations at a restaurant is subtracted from twice the num

pochemuha

Answer:

Its A

Step-by-step explanation:

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2 years ago

Assume that you want to test the claim that the paired sample data come from a population for which the mean difference is μd =

swat32

Answer:

Test statistic, $t_{s} = -0.603$ (to 3 dp)

Step-by-step explanation:

Deviation, d = x -y

Sample mean for the deviation

$\bar{d} = \frac{\sum x-y}{n}$

$\bar{d} = \frac{(28-6) + (31-27)+(20-26)+(25-25)+(28-29)+(27-32)+(33-33)+(35-34)}{8} \\\bar{d} = -0.625$

Standard deviation: $SD = \sqrt{\frac{\sum d^{2} - n \bar{d}^2}{n-1} }$

$\sum d^{2} = (28-26)^2 + (31-27)^2 +(20-26)^2 +(25-25)^2 +(28-29)^2 +(27-32)^2 +(33-33)^2 +(35-34)^2\\\sum d^{2} = 63$

$SD = \sqrt{\frac{63 - 8 * (-0.625)^2}{8-1} }$

SD =2.93

Under the null hypothesis, the formula for the test statistics will be given by:

$t_{s} = \frac{ \bar{d}}{s_{d}/\sqrt{n} } \\t_{s} = \frac{- 0.625}{2.93/\sqrt{8} }$

$t_{s} = -0.6033$

6 0

3 years ago

Simplify (8x^3-5x-1)-(7x^2+6x-10)

irakobra [83]

Answer:

8x^3-7x^2-11x+9

Step-by-step explanation:

(8x^3-5x-1)-(7x^2+6x-10)

remove unnesasary ( )

8x^3-5x-1 -(7x^2+6x-10)

the distribute

8x^3-5x-1 -7x^2-6x+10

combine like terms

8x^3-11x+9-7x^2

use the communative property to reorder the equation

8x^3-7x^2-11x+9

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2 years ago

The population is decreasing at a rate of 5% per year. If the population is 28,400 today, what will the population be in 8 years

Natali [406]

Answer:

710

Step-by-step explanation:

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2 years ago