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andreev551 [17]
3 years ago
9

Which expression best completes the following definition of a complex number?

Mathematics
2 answers:
k0ka [10]3 years ago
7 0

Answer:

C. a+bi

I took the test

Degger [83]3 years ago
5 0
The answer is Isd= uyju love
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PLEASE HELP ME ASAP IMDOING FINALS
Minchanka [31]
The answer is A: 4/3=DE/9

4 is corresponding to line DE
3 is corresponding to 9

5 0
3 years ago
A circle is centered at the point (5, -4) and passes through the point (-3, 2).
Sedbober [7]

Answer:

The equation of the circle is (x + -5)² + (y + 4)² = 100

Step-by-step explanation:

* Lets revise the standard form of the equation of the circle

- If the center of the circle is point (h , k) and the length of its radius is r,

 then the equation of the circle is (x - h)² + (y - k)² = r² in standard form

* Now lets solve the problem

- The center of the circle is point (5 , -4)

∴ h = 5 and k = -4

∴ The equation of the circle is (x - 5)² + (y - -4)² = r²

∴ The equation of the circle is (x - 5)² + (y + 4)² = r²

- The circle passes through the point (-3 , 2)

- To find r substitute the x-coordinate and the y-coordinate of the

  point in the equation of the circle

∵ Point (-3 , 2) is on the circle

∴ x = -3 and y = 2

∴ (-3 - 5)² + (2 + 4)² = r² ⇒ simplify it

∴ (-8)² + (6)² = r² ⇒ solve power 2

∴ 64 + 36 = r² ⇒ add the like terms

∴ 100 = r²

∵ The equation of the circle is (x - 5)² + (y + 4)² = r²

∴ The equation of the circle is (x - 5)² + (y + 4)² = 100

- To complete the form

∴ The equation of the circle is (x + -5)² + (y + 4)² = 100

8 0
3 years ago
(I WILL GIVE BRAINLIEST)
LUCKY_DIMON [66]

For this case we have the following polynomial:

3x ^ 2 + 9x + 15

The standard form of the polynomial is given by:

ax ^ 2 + bx + c

Where, the axis of symmetry of the polynomial is given by the expression:

x = - \frac {b} {2a}}

In this case we have:

a = 3\\b = 9

Therefore, replacing values we have:

x = - \frac {9} {2 (3)}

Rewriting we have:

x = - \frac {9} {6}\\x = - \frac {3} {2}

Answer:

The symmetry axis of the polynomial is given by:

x = - \frac {3} {2}

option C

6 0
3 years ago
Which letter has rotational symmetry? Answer Choices: 1. B 2. R 3. J 4. I
Whitepunk [10]
The answer is 4. I but it has to be capital
8 0
3 years ago
What number can you use to simplify 5 and 15?
pshichka [43]

Answer:

You can use 5 to simplify 5 and 15, giving you 1 and 3

If this answer was helpful please consider giving brainliest!

7 0
3 years ago
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