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marysya [2.9K]
2 years ago
5

Which choices are equivalent to the expression below? Check all that apply

Mathematics
1 answer:
ipn [44]2 years ago
5 0

The expression which is equivalent to √(-9) is 3i.

<h3>What is Complex number?</h3>

A complex number is the sum of a real number and an imaginary number. A complex number is of the form a + ib and is usually represented by z.

Here, given expression;

    y = √(-9)

    y = √9 X √(-1)

   y = 3√(-1)

   y = 3i

Thus, the expression which is equivalent to √(-9) is 3i.

Learn more about Complex number from:

brainly.com/question/10251853

#SPJ1

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Rabies is a viral disease of mammals transmitted through the bite of a rabid animal. The virus infects the central nervous syste
lisabon 2012 [21]

Answer:

(a) The value of <em>x</em> is 0.30.

(b) The probability that a reported case of rabies is not a raccoon is 0.45.

(c) The probability that a reported case of rabies is either a bat or a fox is 0.15.

Step-by-step explanation:

Denote the events as follows:

<em>R</em> = reported case of rabies is a raccoon

<em>F</em> = reported case of rabies is a fox

<em>B</em> = reported case of rabies is a bat

<em>O</em> = reported case of rabies is a some other animal.

The data provided is:

P (R) = 0.55

P (F) = 0.11

P (B) = 0.04

P (O) = <em>x</em>.

(a)

A property of a probability distribution is that the sum of all individual properties is 1.

That is, \sum P(X)=1

Compute the value of <em>x</em> as follows:

\sum P(X)=1\\P(R)+P(F)+P(B)+P(O)=1\\0.55+0.11+0.04+x=1\\0.70+x=1\\x=1-0.70\\x=0.30

Thus, the value of <em>x</em> is 0.30.

(b)

The probability of the complement of an event is the probability of its not happening.

P(A^{c})=1-P(A)

Compute the probability that a reported case of rabies is not a raccoon as follows:

P(R^{c})=1-P(R)\\=1-0.55\\=0.45

Thus, the probability that a reported case of rabies is not a raccoon is 0.45.

(c)

Compute the probability that a reported case of rabies is either a bat or a fox as follows:

P(B\cup F)=P(B)+P(F)\\=0.11+0.04\\=0.15

Thus, the probability that a reported case of rabies is either a bat or a fox is 0.15.

4 0
3 years ago
Which interval for the graphed function has a local minimum of 0?
koban [17]

Answer:

{2,4} I know cause I JUST took the same test yesterday :) I guess I didin't help much huh


8 0
3 years ago
Read 2 more answers
You are playing the game "Hidden Treasure" and your hint is that the treasure is 9 spaces away from the point (0, 0). Which of t
olganol [36]

Answer:

9,0 0,9 -9,0 0,-9

Step-by-step explanation:

up down left right

7 0
2 years ago
Part - A
Oduvanchick [21]

Answer:

rule add 15 subtract 10

Step-by-step explanation:

rule add 15 subtract 10

5 0
2 years ago
A student says that 2 1/4 + 1 2/4 =5. Why is that answer wrong?
saw5 [17]
2 1/4 + 1 2/4 ≠ 5

Why?

2 1/4 + 1 2/4 
=3 3/4

The answer is wrong because the student added wrong. The real answer is 3 3/4.
8 0
3 years ago
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