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Nina [5.8K]
3 years ago
7

When writing expressions for complex numbers, what does i represent?

Mathematics
1 answer:
lubasha [3.4K]3 years ago
3 0

Answer: See below

Step-by-step explanation:

i is an imaginary number.

i=\sqrt{-1}

i^2=-1

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find the common ratio r for the geometric sequence and use r to find the next three terms 5,15,45,135
OlgaM077 [116]

Answer:

405

Step-by-step explanation:

r sequence= 5,15,45,135

d sequence:=10,30,90,270

r ratio is the Radio

d ratio is de Diameter

2*r=d

5*2=10, 15*2=30, 45*2=90, 135*2=270

to complete the sequence:

r+d= next r and continue

5+10=15

15+30=45

45+90=135

135+270=405

4 0
3 years ago
A housekeeper was earning $9.50 an hour before a
Degger [83]

Answer:

raise = $0.76

new wage = $10.26 per hour

Step-by-step explanation:

8% in decimal form = 8/100 = 0.08

To find 8% of 9.50:  0.08 x 9.50 = 0.76

Therefore, the housekeeper's raise = $0.76

To calculate the amount she now earns after the raise, add the 8% rise to the initial value:

0.76 + 9.50 = $10.26

5 0
2 years ago
Nadia selects three marbles from the jar to the right without replacing them. What is the probability that all three marbles are
Savatey [412]
Not very likely. Does a picture come with this question.
4 0
3 years ago
Suppose that a school has 20 classes: 16 with 25 students in each, three with 100 students in each, and one with 300 students, f
astraxan [27]

Answer

a)   y    |      p(y)

    25   |      0.8

   100   |     0.15

   300   |      0.05

E(y) = ∑ y . p(y)

E(y) = 25 × 0.8 + 100 × 0.15 + 300 × 0.05

E(y) = 50

average class size equal to E(y) = 50

b)  y    |      p(y)

    25   |     \dfrac{16\times 25}{1000}=0.4

   100   |     \dfrac{3\times 100}{1000}=0.3

   300   |      \dfrac{1\times 300}{1000}=0.3

E(y) = ∑ y . p(y)

E(y) = 25 × 0.4 + 100 × 0.3 + 300 × 0.3

E(y) = 130

average class size equal to E(y) = 130

c) Average Student in the class in a school = 50

  Average student at the school has student = 130

5 0
3 years ago
Pleaseee help, question what is the sum of 4x^2 + 2x - 5 and 7x^2 - 5x + 2
Nataliya [291]

Simplification of polynomials.

Polynomials <em>are</em> mathematical expressions made up of many terms.<em>To</em> simplify a polynomial <em>the most, you must collect all</em><em> </em>like terms <em>and rearrange them from highest to lowest power.</em>

<h3>4x² + 2x -5 + 7x² - 5x+2</h3><h3>4x² + 2x -3 + 7x² - 5x+2</h3><h3>11x² + 2x - 3 - 5x</h3><h3>11x² - 3x - 3 ====> Option "A"</h3>
6 0
1 year ago
Read 2 more answers
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