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
GalinKa [24]
3 years ago
12

Simplify the given expression below: (−3 + 2i) ⋅ (2 + i) A. −8 + i B. −6 + 3i C. −3 + 4i D. −1 + 2i

Mathematics
1 answer:
oksian1 [2.3K]3 years ago
7 0

Answer:

-8 + i

Step-by-step explanation:

(-3 + 2i) * (2 + i)

= -6 + -3i + 4i + 2i^2

= -6 + i - 2

= -8 + i

You might be interested in
Can you help me find the test statistic AND Pvalue for a hypothesis test. The question is: In a survey respondents were asked wo
vitfil [10]

Answer:

Test statistic z=0.65

P-value=0.52

Fail to reject the null hypothesis.

Step-by-step explanation:

Here we have to perform a hypothesis test on the difference of proportions. We may want to answer if there is significant difference in the proportions of male and females.

The null and alternative hypothesis are:

H_0: \pi_1=\pi_2\\\\H_1: \pi_1\neq\pi_2

The significance level is defined as 0.05.

The YES proportion for females is:

p_1=33/98=0.337

The YES proportion for males is:

p_2=30/102=0.294

The weighted average of p can be calculated as:

p=\frac{n_1*p_1+n_2*p_2}{n_1+n_2}=\frac{33+30}{98+102}=0.315

With this p, we estimate the standard deviation

s=\sqrt{\frac{p(1-p)}{n_1}+\frac{p(1-p)}{n_2} }=\sqrt{\frac{0.315(1-0.315)}{98}+\frac{0.315(1-0.315)}{102} }=0.066

The test statistic z can be calculated as:

z=\frac{p_1-p_2}{s} =\frac{0.337-0.294}{0.066}=\frac{0.043}{0.066}=0.65

We can calculate the p-value for z, taking into account is a two-sided test

P(|z|>0.65)=0.52

The P-value (0.52) is greater than the significance level (0.05), so the effect is not significant. It failed to reject the null hypothesis.

We have enough evidence to conclude that the proportions that vote YES are different between genres.

8 0
4 years ago
The number 15 is less than the number of stripes on Penny's cat. Which of the following inequalities represents the number of st
VLD [36.1K]

Answer: A

Step-by-step explanation:

Let x represent the number of stripes on Penny's cat

< is less than

<u>The number of stripes is less than 15</u>

x < 15

5 0
3 years ago
Read 2 more answers
I’ll give brainlest please help!
boyakko [2]
The surface area is 158 inches.
4 0
3 years ago
Two similar prisms are in a ratio of 5:6. What is the ratio of their volumes?
Inessa05 [86]

Answer:

Sorry sis don't know the answer

3 0
3 years ago
Find the equation of a line that passes through the points (1,-3) and (3,-1).
Alexxandr [17]
The answer is:
y = x - 4

m is the gradient.
c is the y-intercept

Hope this helps!
Please give Brainliest!
5 0
2 years ago
Other questions:
  • There are 18 cupcakes. How many 3/4 size servings can you make?
    6·1 answer
  • I need help on this question
    6·1 answer
  • I need help with this please!!!!!!
    11·2 answers
  • Someone tell me the answer please
    15·1 answer
  • A point has no physical characteristics.<br><br> True<br> False
    13·1 answer
  • Which of the following disjunctions is true? 4 + 4 = 16 or 6 - 5 = 11 4 · 3 = 7 or 3 - 2 = 5 8 - 5 = 13 or 7 · 2 = 12 7 - 4 = 11
    11·1 answer
  • Please help, I'll give the correct answer brainliest.<br><br>find c and d. show your work. ​
    13·1 answer
  • 9x + 5 i dont know what it means
    14·2 answers
  • Easy question 34.8 + 6.879 =?
    6·1 answer
  • SOMEONE HELP IM NEWE SORRY TYSM IF U DO&lt;3333
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!