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3 years ago

If A and B are independent events, P(A and B) =

Mathematics

2 answers:

Hunter-Best [27]3 years ago

4 0

Answer:

If its p (ab) then the answer is C

If its p (a+b) then answer is D

Step-by-step explanation:

Gwar [14]3 years ago

3 0

Answer:

C. P(A) * P(B)

Step-by-step explanation:

If A and B are independent events, then

$P(A\:and\:B)=P(A)\times P(B)$ .

Otherwise, A and B are dependent events.

The correct answer is choice C

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In 2010, the population of a city was 180,000. From 2010 to 2015, the population grew by 7%. From 2015 to 2020, it fell by 4%. H

alex41 [277]

Answer:

The population grew by 12600 people.

Step-by-step explanation:

In 2010, the population of a city was 180,000. From 2010 to 2015, the population grew by 7%. From 2015 to 2020, it fell by 6%. How much did the population grow from 2010 to 2015, to the nearest 100 people?

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3 years ago

What are the possible values of x for the following functions? F(x)=2-x / x(x-1)

UkoKoshka [18]

Answer:

$x \in \mathbb{R}-\{0,1\}$

Step-by-step explanation:

The denominator cannot be 0 (since division by 0 is undefined), meaning x cannot be 0 or 1.

So, the domain is

$x \in \mathbb{R}-\{0,1\}$

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1 year ago

alpha and beta are the zeros of the polynomial x^2 -(k +6)x +2(2k -1). Find the value of k if alpha + beta = 1/2 alpha beta(ITS

serious [3.7K]

Answer:

$k=\frac{-11}{2}$ .

Step-by-step explanation:

We are given $\alpha$ and $\beta$ are zeros of the polynomial $x^2-(k+6)x+2(2k-1)$ .

We want to find the value of $k$ if $\alpha+\beta=\frac{1}{2}$ .

Lets use veita's formula.

By that formula we have the following equations:

$\alpha+\beta=\frac{-(-(k+6))}{1}$ (-b/a where the quadratic is ax^2+bx+c)

$\alpha \cdot \beta=\frac{2(2k-1)}{1}$ (c/a)

Let's simplify those equations:

$\alpha+\beta=k+6$

$\alpha \cdot \beta=4k-2$

If $\alpha+\beta=k+6$ and $\alpha+\beta=\frac{1}{2}$ , then $k+6=\frac{1}{2}$ .

Let's solve this for k:

Subtract 6 on both sides:

$k=\frac{1}{2}-6$

Find a common denominator:

$k=\frac{1}{2}-\frac{12}{2}$

Simplify:

$k=\frac{-11}{2}$ .

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3 years ago

I’m confused on this question

NNADVOKAT [17]

So what you would want to do is plot the points in a graph, when you do so you line the points and it will give you a triangle.

So in conclusion it should be, a.) Isosceles

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3 years ago

23. Drug Testing Job Applicants Find the probability of selecting someone who uses drugs.

Dovator [93]

Answer:

Step-by-step explanation:

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3 years ago