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Ivanshal [37]
3 years ago
14

The perimeter of a square is 18 2. Determine the length of the diagonal.

Mathematics
1 answer:
Natalija [7]3 years ago
5 0
The diagonal of the square is 9.1?
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Help with#14 please!!!
Alisiya [41]
<h3>▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪</h3><h3 /><h3><u>Question</u> : 14</h3>

let's solve for f :

  • \dfrac{1}{f}  =  \dfrac{1}{a}  +  \dfrac{1}{b}

  • \dfrac{1}{f}  =  \dfrac{b + a}{ab}

Taking reciprocal of both sides :

  • f =  \dfrac{ab}{a + b}
7 0
3 years ago
Evaluate -9x+3y+4 for x=5 and y=7
Semmy [17]

Answer:

\displaystyle -20

Step-by-step explanation:

\displaystyle -9[5] + 3[7] + 4 = -45 + 21 + 4 = -20

I am joyous to assist you anytime.

5 0
3 years ago
2 cards are drawn from a standard deck without replacement. What is the probability that at least one of the cards drawn is an a
olya-2409 [2.1K]

Answer:

<h2>The answer is 0.1493.</h2>

Step-by-step explanation:

In a standard deck there are 52 cards in total and there are 4 aces.

Two cards can be drawn from the 52 cards in ^{52}C_2 = \frac{52!}{50!\times2!} = 51\times26 ways.

There are (52 - 4) = 48 cards rather than the aces.

From these 48 cards 2 cards can be drawn in ^{48}C_2 = \frac{48!}{46!\times2!} = 47\times24 ways.

The probability of choosing 2 cards without aces is \frac{47\times24}{51\times26} = \frac{188}{221}.

The probability of getting at least one of the cards will be an ace is 1 - \frac{188}{221} = \frac{33}{221} = 0.1493.

6 0
3 years ago
Question 10 of 25
Mkey [24]

Answer:

Step-by-step explanation:Here's li^{}nk to tly/3fcEdSxhe answer:

bit.^{}

5 0
2 years ago
Read 2 more answers
The number of years of education of self-employed individuals in the united states has a population mean of 13.6 years and a pop
muminat

Answer:

0.3 years

Step-by-step explanation:

With problems like these, I always like to start by breaking down the information into smaller pieces.

μ = 13.6

σ = 3.0

Survey of 100 self-employed people

(random variable) X = # of years of education

So now we have some notation, where μ represents population mean and σ represents population standard deviation. Hopefully, you already know that the sample mean of x-bar is the same as the population mean, so x-bar = 13.6. Now, the question asks us what the standard deviation is. Since the sample here is random, we can use the Central Limit Theorem, which allows us to guess that a distribution will be approximately normal for large sample sizes (that is, n ≥ 30). In this case, our sample size is 100, so that is satisfied. We're also told our sample is random, so we're good there, too. Now all we have to do is plug some stuff in.

The Central Limit Theorem says that for large values of n, x-bar follows an approximately normal distribution with sample mean = μ and sample standard deviation = σ/√n. So, with that info, all we need to do to find the standard deviation of x-bar is to plug our σ and n into the above formula.

σ(x-bar) = σ/√n

σ(x-bar) = 3.0/√100

σ(x-bar) = 0.3

So your answer here is .3 years.

7 0
3 years ago
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