1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
yuradex [85]
2 years ago
6

Can you help me solve this please ​

Mathematics
1 answer:
OLga [1]2 years ago
8 0

Answer:

-22+27i

Step-by-step explanation:

i =  \sqrt{ - 1}  \\ (3 - 4i)( - 6 + i) \\  = (3 - 4 \sqrt{ - 1} )( - 6 +  \sqrt{ - 1} ) \\  = 3( - 6 +  \sqrt{ - 1)}  - 4 \sqrt{ - 1} ( - 6 +  \sqrt{ - 1} ) \\  =  - 18 + 3 \sqrt{ - 1}  + 24 \sqrt{ - 1}  - 4 \\  =  - 22 + 27 \sqrt{ - 1} \\ putting \:  \:  \:  \sqrt{ - 1 }  = i \\  =  - 22 + 27i

Hope it helps.

Don't forget to click the Brainliest button if you like my answer.

You might be interested in
Graph the line whose x-intercept is 8 and whose y-intercept is -9.
eduard

Answer: attached image

7 0
2 years ago
Before changes to its management staff, an automobile assembly line operation had a scheduled mean completion time of minutes. T
Sergio [31]

No, we don't have evidence to support that the mean completion time under new management has decreased but we can conclude that it remains at 15.5 minutes.

Given mean of 15.5 minutes , standard deviation of 1.7 minutes, sample size of 90 and sample mean of 15.4 minutes.

We can do the following study for conclusion:

Firstly the null hypothesis is

H_{0}: x=15.5

The alternate hypothesis is

H_{1}: x < 15.5

since the value is less than this is a one tailed test.

Z=x bar-x/d/\sqrt{n}

where x is sample mean and d is standard deviation.

Z=15.4-15.5/1.7/\sqrt{90}

=-0.1/1.7/9.4868

=-0.560

Critical value of Z at 0.1 level of significance

Z=-1.28

We fails to reject the null hypothesis since -0.560>-1,28

Hence we don't have evidence to support that the mean completion time under new management has decreased but we can conclude that it remains at 15.5 minutes.

Learn more about hypothesis at brainly.com/question/11555274

#SPJ4

Question is incomplete. It should include:

mean of 15.5 minutes ,

standard deviation of 1.7 minutes,

sample size of 90

and sample mean of 15.4 minutes.

5 0
1 year ago
Explain how to solve 5x^2-3x=25 by completing the square. What are the solutions?
hodyreva [135]

Answer:

can you help me

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
What is the solution of the equation 4p/6+27
anyanavicka [17]
The answer is 36 I'm pretty sure
7 0
3 years ago
HELP I'M TIMED! Reflect triangle ABC over the y-axis. What is the relationship between the segments created if you connect the p
4vir4ik [10]

This is your answer thanks!


3 0
3 years ago
Read 2 more answers
Other questions:
  • If the expression is expanded, what is the coefficient of x ? <br><br>4(3x+5)
    15·1 answer
  • 7<br> /8/1/4 neeeeeeeeeeeed help
    10·2 answers
  • The number a exceeds the number b by 50 percent. By what percent is the number b smaller than the number a?
    14·1 answer
  • HELP ASAP: Factor By Grouping: 12a^3 - 9a^2 + 4a - 3
    14·1 answer
  • Eloise scored a total of 268 points during the basketball season. Of her total points, l points came from left handed shots. She
    14·1 answer
  • In the diagram, WX, XY and YZ are three sides of a regular polygon A.
    6·1 answer
  • Find the missing side or angle.
    14·1 answer
  • Need help ASAP <br> Thankss + BRAINLIST only for correct answer
    15·1 answer
  • Si caminara 1 2/3 alrededor de la jardinera triangular,Cuantos metros recorrería?
    7·1 answer
  • Paul bought a photo frame which measured 10 inches in length and 8 inches in width. Determine the diagonal length of the photo f
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!