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astraxan [27]
3 years ago
11

Your school wants to have 5 computers for every 12 students. There are now 125 computers and 924 students. How many more compute

rs are needed to have a ratio of 5 to 12?
Mathematics
2 answers:
skad [1K]3 years ago
7 0
You can first set up a ratio to see how many TOTAL computers are needed for a r to 12 ratio.
(5/12) = (x/924) Now cross multiply to solve. 12x = 5(924) 12x = 4620
Divide both sides by 12. x = 385
There are a total of 385 computers needed for the school to have a 5:12 ratio.
Since the school already has 125 computers subtract 385-125 = 260. They need to purchase 260 more computers.
satela [25.4K]3 years ago
5 0

Answer:

260 computers will be required more for 125 students.

Step-by-step explanation:

As it is given in the question school wants to have 5 computer for every 12 students.

Current number of computers are 125 and number of students are 924.

Let the number of computers is n for 924 students and the ratio of computers and students is 5 : 12

So \frac{\text{Current number of computers}}{\text{Current number of students}}=\frac{5}{12}

Therefore, \frac{x}{924}=\frac{5}{12}

x = \frac{924\times 5}{12}=385

But the number computers is = 125

Therefore, number of computers required more will be

385 - 125 = 260

260 computers will be required more for 125 students.

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MissTica

Answer:

Shifted to the right by 9 units, and down by 7 units

Step-by-step explanation:

y=x is the origin.

(x-9) shows that the graph has moved 9 units to the right, as what is inside the parentheses indicates the opposite direction

(you can be able to review why this is from online resources or you can ask your teacher)

the -7 shows that the graph moves 7 units down the graph, it's outside the parentheses, so it follows the same direction

let's sum up:

for this situation,

- what is inside the parentheses is the x

- what is outside the parentheses is the y

- the x-values direction shifts opposite from the sign (+/-)

- the y-values direction shifts like the sign (+/-)

So,

the vertex has been shifted to the right by 9 units, and down by 7 units compared to y=x.

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3 years ago
Can anyone hknow number 2?
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Answer:

n = y/(r+s)

Step-by-step explanation:

(rn+sn) / y = 1

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(rn+sn) / y  *y= 1*y

rn+sn = y

Factor out n

n(r+s) = y

Divide each side by (r+s)

n(r+s) / (r+s) = y/(r+s)

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12,000,055 + 60 + 16 + 90 x 40
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Step-by-step explanation:

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<h2><u>Answer with explanation:</u></h2>

Let \mu be the population mean strain in a way that conveys information about precision and reliability.

The sample mean is the best point estimate of the true population mean .

As per given , we have

Sample size : n= 12

degree of freedom : df=12-1=11

Sample mean : \overline{x}=25.0

The true average strain in a way that conveys information about precision and reliability= 25.0

sample standard deviation : s= 3.3

Significance level : \alpha= 0.05

Since sample population standard deviation is unknown , so we use t-test.

Critical t-value for t : t_{\alpha/2, df}=t_{0.025, 11}=2.201

95% Confidence interval for true average strain in a way that conveys information about precision and reliability:

\overline{x}\pm t_{\alpha/2, df}\dfrac{s}{\sqrt{n}}

25.0\pm (2.201)\dfrac{3.3}{\sqrt{12}}\\\\=\approx 25.0\pm2.10\\\\=(25.0-2.10, 25.0+2.10)=(22.9,\ 27.1)

The 95% Confidence interval for true average strain in a way that conveys information about precision and reliability: (22.9,\ 27.1)

We 95% confident that the true population average strain in a way that conveys information about precision and reliability lies between 22.9 and 27.1 .

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