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Alex777 [14]
3 years ago
13

Which algebraic expression represents the phrase below? Four less than the product of twice a number and eight

Mathematics
2 answers:
Vanyuwa [196]3 years ago
7 0

Answer:

(2x)(8)-4.

Step-by-step explanation:

Let x represent the number.

We are asked to write an algebraic expression for the given phrase.

Phrase: Four less than the product of twice a number and eight.

Since our number is x, so twice the number would be 2x.

The product of twice a number and eight would be (2x)(8)

Four less than the product of twice a number and eight would be (2x)(8)-4.

Therefore, our required expression would be (2x)(8)-4.

murzikaleks [220]3 years ago
3 0
2(x-8)-4

Hope this helps!
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A study of peach trees found that the average number of peaches per tree was 725. The standard deviation of the population is 70
TEA [102]

Answer:

She needs to sample 189 trees.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

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Now, we have to find z in the Ztable as such z has a pvalue of 1 - \alpha.

That is z with a pvalue of 1 - 0.025 = 0.975, so Z = 1.96.

Now, find the margin of error M as such

M = z\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

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This means that \sigma = 70

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She needs to sample n trees.

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M = z\frac{\sigma}{\sqrt{n}}

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Dividing both sides by 10:

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50 - 5 to the second power divided by 5
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Hey!

--------------------------------------------------

Steps To Solve:

50 - 5² ÷ 5

~Solve for exponent

50 - 25 ÷ 5

~Divide

50 - 5

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45

--------------------------------------------------

Answer: \Large\boxed{\mathsf{45}}

--------------------------------------------------

Hope This Helped! Good Luck!

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A What fractions can you find that are equivalent to 2/3?
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