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3 years ago

7

Im confused on this practice quiz if anyone can help verify answers 1 and 2 and explain how to get 3 and 4 I would really apprec

iate it

1 answer:

spin [16.1K]3 years ago

4 0

Answer: 1 and 2 are correct

Step-by-step explanation: 3 is going to be c and 4 is going to be B

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There are 10 pens in a box. There are x red pens in the box. All the other pens are blue. Jack takes at random two pens from the

expeople1 [14]

The probability that one of each color is selected is $\frac{10x - x^2}{45}$

<h3>Probabilities</h3>

The probability of an event is the chances of the said event

The given parameters are:

Total = 10
Red = x
Blue = 10 - x

<h3>Calculating the required probability</h3>

The probability that one of each color is selected is calculated as follows:

$P = P(Blue) \times P(Red) + P(Red) \times P(Blue)$

So, we have:

$P = \frac{10 - x}{10} \times \frac{x}{9} + \frac{x}{10} \times \frac{10 - x}{9}$

This gives

$P = \frac{x(10 - x)}{90} +\frac{x(10 - x)}{90}$

Take LCM

$P = \frac{2x(10 - x)}{90}$

Simplify the above expression

$P = \frac{x(10 - x)}{45}$

Expand

$P = \frac{10x - x^2}{45}$

Hence, the probability that one of each color is selected is $P = \frac{10x - x^2}{45}$

Read more about probabilities at:

brainly.com/question/7965468

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3 years ago

Height versus age.

LenaWriter [7]

So basically the height is divided by a certain number to evenly divide it

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3 years ago

Evaluate 12x−3y when x=−14 and y=3

Amiraneli [1.4K]

12x - 3y

12(-14) - 3(3)

-168 + 9

-159

Hope this helps!! :)

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3 years ago

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Answer:

it is c it is c it is c it is c

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Answer:

x=-2

Step-by-step explanation

1) Remove () and Rewrite

13x+13+2x=1/2x2(5x-7)

2) Collect Like Terms

15x+13=5x-7

3) Move Terms

15x-5x=-7-13

4) Divide Both Sides

10x=-20

ANSWER IS x=-2

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3 years ago

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