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3 years ago

Try, check, and revise or write an equation to solve

Mathematics

1 answer:

Ganezh [65]3 years ago

6 0

Answer:

156 seats were sold at the store and 244 at the gallery

Step-by-step explanation:

Let the amount of stalls be x

Let the price per ticket for gallery be y

If 400 seats were sold in total, then;

x+y = 400 ... 1

If concert tickets are sold for $ 8 for the stalls and $ 6 for the gallery with a total of $2888, then;

8x + 6y = 2888 ....2

Solve both equation simultaneously

x+y = 400 ... 1 * 8

8x + 6y = 2888 ....2 .*1

__________

8x+8y = 3200 .

8x + 6y = 2888

Subtract

__________

8y - 6y = 3200 - 2888

2y = 312

y = 312/2

y = 156

Since x = 400 - x

y = 400 - 156

y = 244

hence 156 seats were sold at the store and 244 at the gallery

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Answer:

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3 years ago

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blondinia [14]

Answer:

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Step-by-step explanation:

Given data

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3 years ago

Using the simple random sample of weights of women from a data set, we obtain these sample statistics: nequals45 and x overbar

Tomtit [17]

Answer: (141.1, 156.48)

Step-by-step explanation:

Given sample statistics : $n=45$

$\overline{x}=148.79\text{ lb}$

$\sigma=31.37\text{ lb}$

a) We know that the best point estimate of the population mean is the sample mean.

Therefore, the best point estimate of the mean weight of all women = $\mu=148.79\text{ lb}$

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$\mu\ \pm E$ , where E is the margin of error.

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$z_{\alpha/2}\times\dfrac{\sigma}{\sqrt{n}}$

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3 years ago

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spayn [35]

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3 years ago

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Greeley [361]

Answer:

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Step-by-step explanation:

I'm pretty sure this is the answer :)

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