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
GrogVix [38]
3 years ago
8

Is 4 + 7i , rational, irrational or complex ?

Mathematics
1 answer:
statuscvo [17]3 years ago
3 0

Answer:

complex

Step-by-step explanation:

a + bi is the format of complex numbers, which are those that contain a real and an imaginary component. Rational and irrational numbers are all real and cannot contain i unless it is to an even power (in which case it becomes -1 or 1).

You might be interested in
What is the area of the figure?<br>​
Oksi-84 [34.3K]

Answer:

5.4 in.

Step-by-step explanation:

Figuring out the area of shapes like these are quite simple, you first have to break apart this shape to make solving this easier. If you draw a line and break off the triangle from the square you will get 2 different shapes. A square with all the sides being 2 inches, and a triangle that is 2 inches tall and 1.4 inches across (you subtract 3.4 by 2). Next you just use the equation (2 * 2) + ((1.4 * 2)/2). Multiply 2 by 2 (which is 4) and you get the area of the square (you multiply the base by the width). And for the triangle you multiple 1.4 by 2 (you get 2.8)... But because it's a triangle you have to divide that number by 2 since the triangle is half of a square. So 2.8 / 2 is going to be 1.4. After that you now have the equation 4 + 1.4 and the answer is going to be 5.4.

6 0
3 years ago
Read 2 more answers
What is the word form of the number 602,107?
Nadusha1986 [10]
<span><u>Answer</u>
Six hundred and two thousand, one hundred and seven.

<u>Explanation </u>
When writing numbers in words you consider the place value of the digits forming that number. A digit is defined by its place value.
In the questions above, 6 is in hundred thousands place, 0 in ten thousands place, 2 in thousands place, 1 in hundreds place, 0 in tens place and 7 in ones place.
So, the 602, 107 in words is Six hundred and two thousand, one hundred and seven. 
</span>
3 0
3 years ago
The population of a city has decreased by 38% since it was last measured. If the current population is 27,900, what what the pre
Varvara68 [4.7K]

<u>Answer: </u>

The population of a city has decreased by 38% since it was last measured. If the current population is 27,900 .Previous population of city was 45000.

<u> Solution: </u>

Given that current population of city is 27900.  

Also, population of a city has decreased by 38% since it was last measured.

Let assume that population of city when it was last measured = x

Decreased of 38% means x-38% of x . we can write this as,

=x-\frac{38}{100} \times x

=\frac{100 x-38 x}{100}

=\frac{62 x}{100}=\frac{31 x}{50}

So current population is \frac{31 x}{50}

Equating above expression to the given value of current population, we get

\frac{31 x}{50}=27900

x=\frac{27900 \times 50}{31}

x=45000

Hence previous population of city was 45000.

7 0
3 years ago
I need to find Y=Mx+b. I found M but i forgot how to find B. Help
enot [183]
Y = mx + b. This linear graph passes through A(0,50) and B(10,51)

m = (y₂-y₁)/(x₂-x₁)
m= (51-50)/10-0)
m=(1)(10)

y = (1/x) + b. To find b, you plugin the coordinates of either A or B,
say A(0,50):

50 = (1/10).(0) + b
50 = 0+b  and b= 51

Hence the equation is y =0.1x + 50


3 0
3 years ago
L 7.8.2 Test (CST): Area, Surface Area, and Volume Question 24 of 30 Find the area of the sector of the circle below. The radius
lawyer [7]

Answer:

28.26 cm^2

Step-by-step explanation:

Mathematically, we have the area of a sector as;

theta/360 * pi * r^2

theta is the angle subtended at the center of the circle by the sector which is 90 degrees

r is the radius of the circle given as 6 cm

Substituting these values;

90/360 * 3.14 * 6^2 = 28.26 cm^2

6 0
2 years ago
Other questions:
  • Hi, can someone help me on these 2 as quick as possible please, ty!!
    8·2 answers
  • Naya is four less than twice her brother's age. Naya is eighteen years old.
    5·2 answers
  • The bacteria took 1 hour and 40 minutes to fill the initial bottle. Explain how it only took 10 minutes to fill 3 additional emp
    15·2 answers
  • What conclusion can you make from the Euler diagram?<br>(I think D)
    7·1 answer
  • What is the value of this expression when c=-4 and d=10? 1/4 (c^3+d^2)
    9·1 answer
  • Determine the y- intercept of 3x+2y=9
    12·2 answers
  • Please solve :)<br> 2y &lt; y + 2
    7·1 answer
  • Math question pls help
    10·1 answer
  • Rearrange the steps to solve for the following equation: 2(x-5)=8
    13·1 answer
  • 2(3n + 7) &gt; 5n<br>Thanks​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!