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
olga2289 [7]
3 years ago
6

Which is equal to (2+3i)+(-4+i)? A, -2-4i B, -2-2i C, -2+2i D, -2+4i E, 6+4i

Mathematics
2 answers:
Darya [45]3 years ago
8 0

Answer:

-2+4i the ansewr is D.

Step-by-step explanation:

Verify Left hand:

Simplify the following:

2 + 3 i - 4 + i

2 + 3 i - 4 + i = (2 - 4) + (3 i + i):

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

2 - 4 = -2:

-2 + (3 i + i)

3 i + i = 4 i:

4 i - 2

Factor 2 out of 4 i - 2 giving 2 (2 i - 1):

Answer: 2 (2 i - 1)

Verify Right Hand:

Simplify the following:

4 i - 2

Factor 2 out of 4 i - 2 giving 2 (2 i - 1):

Answer: 2 (2 i - 1)

inysia [295]3 years ago
6 0

Answer:

D. -2+4i

Step-by-step explanation:

just combine like terms :)

You might be interested in
A horticulturist working for a large plant nursery is conducting experiments on the growth rate of a new shrub. Based on previou
valkas [14]

Answer:

t=\frac{1.8-2}{\frac{0.5}{\sqrt{48}}}=-2.771    

The degrees of freedom are given by:

df=n-1=48-1=47  

And the p value would be:

p_v =P(t_{(47)}    

Since the p value is lower than the significance level we have enough evidence to conclude that the true mean for this case for the growth rate is less than 2cm per week

Step-by-step explanation:

Information given

\bar X=1.8 represent the sample mean for the growth

s=0.5 represent the sample standard deviation    

n=48 sample size    

\mu_o =2 represent the value that we want to compare

\alpha=0.01 represent the significance level

t would represent the statistic    

p_v represent the p value

System of hypothesis

We need to conduct a hypothesis in order to check if the true mean is less than 2cm per week, the system of hypothesis are :    

Null hypothesis:\mu \geq 2    

Alternative hypothesis:\mu < 2    

Since we don't know the population deviation the statistic is given by:

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

Replacing the info given we got:

t=\frac{1.8-2}{\frac{0.5}{\sqrt{48}}}=-2.771    

The degrees of freedom are given by:

df=n-1=48-1=47  

And the p value would be:

p_v =P(t_{(47)}    

Since the p value is lower than the significance level we have enough evidence to conclude that the true mean for this case for the growth rate is less than 2cm per week

6 0
3 years ago
These spam comments are seriously getting out of hand and are really annoying. And the worst part is that you can’t really do an
RideAnS [48]

Answer: Yea at least brainly deleting them when they catch them

Step-by-step explanation:

7 0
2 years ago
What is 12 times the square root of 16?
Vesna [10]
The answer to this is 48
5 0
2 years ago
A cube has an edge length of 4 inches. You double the sides lengths. How many times greater is the volume of the new cube?
N76 [4]
8 times since 4x4x4=64 and 8x8x8=512
so 512/64 equals 8 so it's 8 times greater


<span>-Hope this helps :)</span>
3 0
3 years ago
Read 2 more answers
How to simplify 8(7+8u)
Sliva [168]

Answer:

56+64u

Step-by-step explanation:

distribute the 8

56+64u

8 0
3 years ago
Read 2 more answers
Other questions:
  • Adele has 3 64-ounce cartons of orange juice and 3 48-ounce cans of apple juice. How much juice does she have altogether?
    14·1 answer
  • HELP ME PLEASE! THANK YOU! :)
    11·1 answer
  • Oil consumption in China grew exponentially from 8.938 million barrels per day in 2010 to 10.480 million barrels per day in 2013
    10·2 answers
  • PLEASE help me. Brainliest!
    7·1 answer
  • PLZ HURRY IM I A RUSH THIS FOR 40 POINTS!!
    7·2 answers
  • Which unit would be most appropriate to measure the
    9·1 answer
  • Which expressions are equivalent to square root 1188x^5? Check all that apply
    10·1 answer
  • the factory produces 115 items an hour. Write an equation that shows the relationship between hours x and items y plz help
    13·1 answer
  • HELP MEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE!
    9·1 answer
  • What is the area of this figure?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!