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3 years ago

14

Answer correctly for brainliest

2 answers:

kirill [66]3 years ago

7 0

where is your question?

Marta_Voda [28]3 years ago

7 0

Answer:

what is your question?

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Natasha and Rodrigo are in a class of 30 students that selects 4 leaders. How many ways are there to select the 4 leaders so tha

Andrei [34K]

There are 20853 ways are there to select the 4 leaders so that either Natasha and Rodrigo are both selected or Natasha and Rodrigo are both not selected.

<h3>What is combination?</h3>

A combination is a mathematical technique that determines the number of possible arrangements in a collection of items.

The number of the possible ways will be calculated by:

$=2 ^{28}C_2+^{28}C_4$

$=\dfrac{28\times 27}{2}+\dfrac{28\times 27\times 26\times 25}{4\times 3\times 2}$

$=756+28853$

$=21231$

Hence there are 20853 ways are there to select the 4 leaders so that either Natasha and Rodrigo are both selected or Natasha and Rodrigo are both not selected.

To know more about Combination follow

brainly.com/question/11732255

#SPJ1

8 0

2 years ago

Help even tho it’s multiple choice make sure you are correct... I beg you lol

kondaur [170]

Answer:

The equation of the line is:

$y=(-\frac{1}{2})x+1$

Therefore, option a is the correct answer.

Step-by-step explanation:

Given the points

(-2, 2)

(4, -1)

Finding the slope

$\mathrm{Slope\:between\:two\:points}:\quad \mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}$

$\left(x_1,\:y_1\right)=\left(-2,\:2\right),\:\left(x_2,\:y_2\right)=\left(4,\:-1\right)$

$m=\frac{-1-2}{4-\left(-2\right)}$

$m=-\frac{1}{2}$

As the point-slope form of the equation of the line is

$y-y_1=m\left(x-x_1\right)$

where m is the slope

substituting the values $m=-\frac{1}{2}$ and the point (-2, 2)

$y-y_1=m\left(x-x_1\right)$

$y-2=\frac{-1}{2}\left(x-\left(-2\right)\right)$

$y-2=\frac{-1}{2}\left(x+2\right)$

$y-2=-\frac{1}{2}\left(x+2\right)$ ∵ $\mathrm{Apply\:the\:fraction\:rule}:\quad \frac{-a}{b}=-\frac{a}{b}$

Add 2 to both sides

$y-2+2=-\frac{1}{2}\left(x+2\right)+2$

$y=(-\frac{1}{2})x+1$

Hence, the equation of the line is:

$y=(-\frac{1}{2})x+1$

Therefore, option a is the correct answer.

4 0

3 years ago

Solve for the variable in the following proportion.

kakasveta [241]

Answer:

(c) The value of variable a is 12.5.

Step-by-step explanation:

4 is to 5 as 10 is to a.

or, 4 : 5 = 10 : a

By the RATIO OF PROPORTIONALITY:

$\frac{4}{5} = \frac{10}{a} \\\implies a = \frac{10 \times 5}{4} = 12. 5$

or, the value of a = 12. 5

⇒ 4 is to 5 as 10 is to 12.5

Hence, the value of variable a is 12.5.

8 0

3 years ago

Read 2 more answers

PLS HELP WILL MARK BRAINLIEST!! TY

levacccp [35]

Answer:

20

Step-by-step explanation:

62 = 3x+2

60 = 3x

20 = x

lol yw now make me brainiest pls

6 0

3 years ago

What is the first page in a geography book?

4vir4ik [10]

Answer:

uh i think its a uhhh carrotttt

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers