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4 years ago

Please answer just three questions please!!

2 answers:

6 0

Just guessing the first one would be the third choice the 2nd one would be the fourth choice and the last one would bethe first choice

lora16 [44]4 years ago

6 0

I'm sorry to say that I only know number 1. Number one is 3 hours, only because if you need a total of 440 miles and you traveled 275 miles so far (which is 5hrs because 275 divided by 55 is 5). So you subtract those numbers (440 - 275) giving you 165. So to find out how many more hours you need, you divide 165 divided by 55 giving you 3hrs more to complete the destination.

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Which scale factors produce a contraction under a dilation of the original image?

Leokris [45]

Answer:

1/2

-1/2

Step-by-step explanation:

we know that

If a dilation produce a contraction that means that the absolute value of the scaling factor is less than 1

If a dilation produce an enlargement that means that the absolute value of the scaling factor is greater than 1

Verify each case

case 1) 2

$\left|2\right|=2$

$2 > 1$ ----> is a enlargement

case 2) 1/2

$\left|1/2\right|=1/2$

$1/2 < 1$ ----> is a contraction

case 3) -2

$\left|-2\right|=2$

$2 > 1$ ----> is a enlargement

case 4) -1/2

$\left|-1/2\right|=1/2$

$1/2 < 1$ ----> is a contraction

7 0

3 years ago

PLEASEEE HELP ME ANWSER THISSS ♥️♥️♥️♥️

Vilka [71]

What proof do you need?

5 0

3 years ago

What is sandwich theorem?

nydimaria [60]

In calculus, the squeeze theorem, also known as the pinching theorem, the sandwich theorem, the sandwich rule, the police theorem, the between theorem and sometimes the squeeze lemma, is a theorem regarding the limit of a function. In Italy, the theorem is also known as theorem of carabinieri.

7 0

3 years ago

Read 2 more answers

Find the value or measure

Elenna [48]

It’s 55 degrees because opposite angles are the same in a circle.

4 0

4 years ago

Read 2 more answers

An internet search engine looks for a certain keyword in a sequence of independent web sites. It is believed that 20% of the sit

marusya05 [52]

Answer:

(a) The probability that at least 5 of the first 10 sites contain the given keyword is 0.0328.

(b) The probability that the search engine had to visit at least 5 sites in order to find the first occurrence of a keyword is 0.4096.

Step-by-step explanation:

(a)

Let X = number of sites that contains the keyword.

The probability that a site contains the keyword is, p = 0.20.

The number of sites visited first is n = 10.

The random variable X follows a Binomial distribution with parameter n and p.

The probability mass function of X is:

$P(X=x)={10\choose x}0.20^{x}(1-0.20)^{10-x};\ x=0,1,2,3...$

Compute the probability that at least 5 of the first 10 sites contain the given keyword as follows:

P (X ≥ 5) = 1 - P (X < 5)

= 1 - P (X = 0) - P (X = 1) - P (X = 2) - P (X = 3) - P (X = 4)

$=1-\sum\limits^{4}_{x=0} {10\choose x}0.20^{x}(1-0.20)^{10-x}\\=1-0.1074-0.2684-0.3020-0.2013-0.0881\\=0.0328$

Thus, the probability that at least 5 of the first 10 sites contain the given keyword is 0.0328.

(b)

Let Y = number of sites that contains the keyword.

The probability that a site contains the keyword is, p = 0.20.

The random variable Y follows a Geometric distribution with parameter p.

The probability mass function of Y is:

$P(Y=y)=(1-p)^{x-1}p;\ x=1,2,3...$

Compute the probability that the search engine had to visit at least 5 sites in order to find the first occurrence of a keyword as follows:

P (X ≥ 5) = 1 - P (X ≤ 4)

$=1-\sum\limits^{4}_{x=1} (1-0.20)^{x-1}0.20\\=1-0.20-0.16-0.128-0.1024\\=0.4096$

Thus, the probability that the search engine had to visit at least 5 sites in order to find the first occurrence of a keyword is 0.4096.

4 0

4 years ago