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3 years ago

15

There are 5 envelopes in a box. The envelopes contain a penny, a nickel, a dime, a quarter, and a half-dollar. A person selects

an envelope. Find the expected value of the draw

1 answer:

Irina18 [472]3 years ago

7 0

17 1/5 this is the answer right here your welcome

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Which equation is shown on the graph?

Nostrana [21]

$y=mx+b\\\\A(0;\ 2);\ B(-2;\ 0)\\\\for\ x=2\to y=2\\\\substitute:m\cdot0+b=2\to b=2\\\\y=mx+2\\\\for\ x=-2\to y=0\\\\substitute:-2m+2=0\to-2m=-2\ \ \ /:(-2)\to m=1\\\\Answer:y=x+2\ (B)$

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3 years ago

Find the area of the triangle.

muminat

Answer:

its 10k

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

A drawer contains 8 blue socks,8 black socks,and 4 white socks.socks are picked at random.explain why the events picking a blue

xeze [42]

The probability would be like 14/95

6 0

3 years ago

A student wants to check six websites. Four of the websites are social and two are school-related. After checking just two sites

mash [69]

The approximate probability that she checked a social website first, then a school-related website is 0.267.

First step is to calculate the Total number of websites

Total number of websites=Number of school websites+Number of social websites

Total number of websites=2+4

Total number of websites=6

Second step

Probability of checking the social website first

Probability of checking social website=Number of social websites/Total number of websites

Probability of checking social website= 4/6

Third step

Since one social website is checked which means that she is left with 3 social website and 2 school websites

Total number websites=2+3

Total number websites=5

Forth step

Probability of checking social website=Number of school websites/Total number websites

Probability of checking social website=2/5

Fifth step

Probability= 4/6 x 2/5 = 0.2666

Probability=0.267(Approximately)

Inconclusion the approximate probability that she checked a social website first, then a school-related website is 0.267.

Learn more about probability here:brainly.com/question/25688842

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2 years ago

The population of cats in a rural neighborhood has declined in the last year by roughly 30%. Residents hypothesize that this is

zvonat [6]

Answer:

Orinal number of cats= 171

Step-by-step explanation:

Giving the following information:

Decrease in population= 30%

Current population= 120

<u>To calculate the original number of cats, we need to use the following formula:</u>

Orinal number of cats= current population / (1 - decrease)

Orinal number of cats= 120 / (1 - 0.3)

Orinal number of cats= 171

8 0

2 years ago