3 years ago

How do you slove this?

Mathematics

1 answer:

Anestetic [448]3 years ago

3 0

What are you trying to find?

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What is the solution to the following system?

andrezito [222]

Answer:

l think the problem of the is your work is not of the number l got.

x=2

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2 years ago

Televisions are on sale for 85% of the original price of $499. How do I find out the sale price.

natulia [17]

To find your sale price you must:
$\frac{85}{100} \times 499 =$
just simply follow that operation and you're good to go

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3 years ago

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sveticcg [70]

Answer:

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2 years ago

A test consists of 100 multiple choice questions, each with five possible answers, only one of which is correct. Find the mean a

TEA [102]

Answer: Mean = 20 and standard deviation = 4

Step-by-step explanation:

Let x represents the success of getting the correct answer.

Here, the total number of trials(n) = 100

The probability of getting the correct answer, p = 1/5

Thus, the mean of the number of correct answer,

$\mu_x= np$

$\mu_x= 100\times 1/5$

$\mu_x= 20$

Now, the standard deviation, $\sigma_x= \sqrt{n\times p\times (1-p)}$

$\sigma_x= \sqrt{100\times 1/5\times 4/5}$

$\sigma_x= \sqrt{16}$

$\sigma_x= 4$

Thus, First option is correct.

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3 years ago

Help please <br><br> marking brainlist

luda_lava [24]

I can help you but i cant see with the reflection thingy

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2 years ago