All categories

3 years ago

Express the radical using the imaginary unit, i.

Mathematics

1 answer:

MrMuchimi3 years ago

7 0

Answer:

±3i

Step-by-step explanation:

Given the value ±√-9, we are to express the value using the imaginary number 'I'

±√-9 = ±√9×-1

= ±√9 × √-1

In complex number, √-1 = i

The expression becomes;

±√9 = ±3 × i

±√9 = ±3i

Hence the value in simplified form is ±3i

You might be interested in

A flying disc has a circumference of 75.36 centimeters. What is the area of the flying disc? (Use 3.14 for .)

Hatshy [7]

The area of flying disk is 452.16 square centimeters

Step-by-step explanation:

The disc is in circular shape so we will use the formulas for circle in this question.

Given

Circumference = C = 75.36 centimeters

We have to find the area of the disc for which we have to find the radius first.

Let r be the radius

Then

Circumference is given by:

$C=2\pi r$

putting the values

$75.36 = 2*3.14*r\\75.36 = 6.28r$

Dividing both sides by 6.28

$\frac{6.28r}{6.28} = \frac{75.36}{6.28}\\r = 12\ cm$

The area of circle is given by:

$A = \pi r^2$

Putting the values

$A = 3.14 * (12)^2\\A = 3.14*144\\A =452.16\ cm^2$

Hence,

The area of flying disk is 452.16 square centimeters

Keywords: Circle, area

Learn more about circle at:

#LearnwithBrainly

5 0

3 years ago

P2 + 14p + 40 written as a binomial

BartSMP [9]

P² + 14p + 40
= p² + 10p + 4p + 40
= p(p+10) + 4(p+10)
= (p+10)(p+4)

7 0

3 years ago

True or false? the point at which a tangent line meets a circle is called the point of tangency

gregori [183]

(breaths in) True, The point at which the circle and the line intersect is the point of tangency.

5 0

3 years ago

Read 2 more answers

Help! Help!

Nina [5.8K]

Answer:

1. 50%

2.100%

3.0%

4.100%

Step-by-step explanation:

Use https://www.mathsisfun.com/data/standard-deviation-calculator.html for later references.

8 0

3 years ago

Maria rents a bicycle while on vacation. It costs a flat fee of $19.95 plus $5.50 an hour. Maria rents it for 4 hours. What is t

kolezko [41]

Answer:

36.45

Step-by-step explanation:

5.50 × 3 = 16.5

16.5 + 19.95 = 36.45

sorry if wrong.

hope it helps.

7 0

3 years ago