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3 years ago

What is the value of i^3

Mathematics

2 answers:

PIT_PIT [208]3 years ago

8 0

Answer:

The answer is the last one, -i.

Hope this helped!

vodomira [7]3 years ago

7 0

Answer:

- i

Step-by-step explanation:

i = $\sqrt{-1}$ ⇒ i² = ( $\sqrt{-1}$ )² = - 1, thus

i³ = i² × i = - 1 × i = - i

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What are the answers to these

ziro4ka [17]

Answer:

5A. 80

6A. 84

8. 80

12. 130

17. 800

2. 10.5 cm

3. $102

4. 33 cars

5B. Gas: $55.44 Electricity: $76.56

6B. 85%, $17

Step-by-step explanation:

:) I think these are correct! They are in order from each page!

5A: 80*20%=16

6A: 84*50%=42

8: 80*75%=60

12: 130*40%=52

17: The printer costs $160, and 800*20%=160

2: 25% of 84 is 21 so there is 63 cm left. Divide by 6 and you get 10.5

3: 25% of 136 is 34 so he has 136-34 left, or 102

4: 17.5% of 240 is 42 so there are 198 other colors. Divide by 6 you get 33

5B: 42% of 132 is 55.44 if you subtract you get 76.56

6B: 100%-15%=85% and 85% of 20 is 17

7 0

3 years ago

What is an equation of the line that passes through the points (-1, 6) (−1,6) and (-1, -5) (−1,−5)

slavikrds [6]

Answer:

x = -1

Step-by-step explanation:

You can write the equation of the line by finding the slope between the points and substitute it with a point into the point slope form.

$m = \frac{y_2-y_1}{x_2-x_1} = \frac{6--5}{-1--1} =\frac{11}{0} = und$

These points have a slope which is undefined. This means it is a vertical line that crosses through the x-axis at the x-coordinate of both points -1. The equation is x = -1.

8 0

3 years ago

What is the area of an equalateral triangle of side length x?

OLEGan [10]

First you need to make a line that is perpendicular to one side. The diagram is shown below. then the length of the line that is perpendicular to the triangle is
$\frac{ \sqrt{3}x }{2}$
then the area of the equilateral triangle equals to
$\frac{1}{2} height \times base$
so the area would be
$\frac{ \sqrt{3} {x}^{2} }{4}$

5 0

3 years ago

What is the slope of the line perpendicular to y= -X-7

Sladkaya [172]

Answer:

Step-by-step explanation:

3 0

2 years ago

Does anybody have the answer to this

saveliy_v [14]

Answer:

a) 7

Step-by-step explanation:

a+b = 12

b+c = 17

a+b+c=22

12+c=22

c=10

b=7

a=5

5 0

2 years ago