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
erastova [34]
3 years ago
12

A complex number is a number that can be written in the form a + bi, where a and b are real numbers. In the complex number 4 + 2

i, 4 is the part. In the complex number 4 + 2i, 2 is the part.
Mathematics
2 answers:
Papessa [141]3 years ago
7 0

Answer:

In the complex number 4 + 2i. 4 is the "REAL" part

In the complex number 4 + 2i, 2 is the "IMAGINARY" part

The real part of the complex number -5 + 3i is "-5"

The imaginary part of the complex number -5 + 3i is "3"

Step-by-step explanation:

on edg... Good Luck!!!  :)

IRISSAK [1]3 years ago
6 0

Answer:

In the complex number 4 + 2i, 4 is the <em>real </em>part. In the complex number 4 + 2i, 2 is the <em>imaginary </em>part.

Step-by-step explanation:

The two parts of the complex number are called the <em>real</em> part and the <em>imaginary</em> part. The imaginary part is identified by its multiplier of <em>i</em>.

In the given number, the 2 is multiplied by i, so 2 is the imaginary part. The other part, 4, is the real part.

You might be interested in
The coordinates of the endpoints of AB are A(−2, −2) and B(1, 3). Which measurement is closest to the length of AB in units?
nydimaria [60]

Answer:

Step-by-step explanation:

this person got it wrong, if your on USATESTPREP its 5,8 your welcome$$$

3 0
3 years ago
Read 2 more answers
A random sample of n = 40 observations from a quantitative population produced a mean x = 2.2 and a standard deviation s = 0.29.
zmey [24]

Answer:

t=\frac{2.2-2.1}{\frac{0.29}{\sqrt{40}}}=2.18    

df=n-1=40-1=39  

Since is a one side test the p value would be:  

p_v =P(t_{(39)}>2.18)=0.0177  

If we compare the p value and the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and then the population mes seems to be higher than 2.1 at 5% of significance

Step-by-step explanation:

Data given and notation  

\bar X=2.2 represent the sample mean

s=0.29 represent the sample standard deviation

n=40 sample size  

\mu_o =2.1 represent the value that we want to test

\alpha=0.05 represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean is higher than 2,1, the system of hypothesis would be:  

Null hypothesis:\mu \leq 2.1  

Alternative hypothesis:\mu > 2.1  

If we analyze the size for the sample is > 30 but we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Calculate the statistic

We can replace in formula (1) the info given like this:  

t=\frac{2.2-2.1}{\frac{0.29}{\sqrt{40}}}=2.18    

P-value

The first step is calculate the degrees of freedom, on this case:  

df=n-1=40-1=39  

Since is a one side test the p value would be:  

p_v =P(t_{(39)}>2.18)=0.0177  

Conclusion  

If we compare the p value and the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, and then the population mes seems to be higher than 2.1 at 5% of significance

7 0
3 years ago
Please answer I will give 20 points!!!
Alenkasestr [34]
The answer is: y= –1/3x–5
8 0
3 years ago
The function f(x) = 28(1.45)x models the number of cats and dogs adopted from a local animal shelter, where x represents the num
Phantasy [73]

Answer:

Step-by-step explanation:

If that number is greater than 1, that means that the exponential equation represents growth.  If that number is less than 1 but greater than 0, that means that the exponential equation represents decay.  Since ours is greater than 1, our equation is exponential growth.  It means that the perent of animals adopted grows at a rate of 145% per year, with a starting number of 28 animals in the first year.

6 0
3 years ago
Write the equation if the line that passes through (4,5) and has a slope of m=3
andrew11 [14]

Answer:

y = 3x - 7

Step-by-step explanation:

The <em>point-slope formula</em> for a straight line is

y – y₁ = m(x – x₁)

x₁ = 4; y₁ = 5; m = 3     Substitute the values

y – 5 = 3(x - 4)             Remove parentheses

y – 5 = 3x - 12             Add 5 to each side

     y = 3x - 7

The graph is a straight line with a y-intercept at y = -7 and a slope = 12/4 = 3.

6 0
3 years ago
Other questions:
  • Which expression is equivalent to 16(30x−24y)−18(32x−16y)16(30x-24y)-18(32x-16y)?
    13·1 answer
  • 7+4×-9=-6<br>please show the work
    15·1 answer
  • Please Help Me!<br> This worth 25 points !<br> ASAP PLEASE PLEASE . . .
    9·1 answer
  • The value of 3 in 43158 is times the value of 3 in 71435
    9·1 answer
  • A landscaper is planting a row of 10 shrubs along the walkway shown below. There must be one shrub at the very beginning and one
    13·1 answer
  • What is 3p (equal sign) 4-9p
    11·2 answers
  • What is the surface area of the triangular prism?
    13·2 answers
  • A plumber charges $25 for a service call plus $50 per hour of service. Write an equation in slope-intercept form for the cost, C
    10·1 answer
  • Please help me with this Arithmetic Sequences and Series Question:
    15·1 answer
  • Help! im doing a gooru question but i dont know how to do it
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!