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3 years ago

How can you factor three x squared plus twenty five x plus eight??

Mathematics

2 answers:

8090 [49]3 years ago

5 0

(3x^2 + 25x + 8)

(3x + 1 )(x + 8)

hope this helps :)

Inessa05 [86]3 years ago

4 0

3x^2 + 25x + 8
= (3x+1) (x+8)

To prove if the answer is correct, you can simply use foil method to find it.

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g A researcher wants to construct a 95% confidence interval for the proportion of children aged 8-10 living in Atlanta who own a

Helga [31]

Answer:

The sample size needed is 2401.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error of the interval is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

Estimate the sample size needed if no estimate of p is available so that the confidence interval will have a margin of error of 0.02.

We have to find n, for which M = 0.02.

There is no estimate of p available, so we use $\pi = 0.5$

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.02 = 1.96\sqrt{\frac{0.5*0.5}{n}}$

$0.02\sqrt{n} = 1.96*0.5$

$\sqrt{n} = \frac{1.96*0.5}{0.02}$

$(\sqrt{n})^{2} = (\frac{1.96*0.5}{0.02})^{2}$

$n = 2401$

The sample size needed is 2401.

7 0

3 years ago

Read 2 more answers

Ez question plz help

zhannawk [14.2K]

Answer:60 miles per hour

Step-by-step explanation:

5 0

3 years ago

10 x 23 x 4 divided by 54 x 4

barxatty [35]

Answer: roughly 4.2593

Step-by-step explanation:

920/216

put the equation through a calculator

approx. 4.2593

7 0

3 years ago

Read 2 more answers

Michael has $1,059.35 in his checking account. He is going to spend $466.43 on a new television, and he will spend the rest on s

sesenic [268]

Answer:

D. $43.00x + $466.43 < $1,059.35

Step-by-step explanation:

He has $1,059.35.

The amount of speakers he buys is x.

Each speaker is $43.00, and he is buying one television, which is $466.43.

All of the speakers he buys and(+) the television must be less than $1,059.35 because that's all he has. It cannot be more, which is why the equation is $43.00x + $466.43 < $1,059.35.

Hope this helps!

3 0

2 years ago

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What is this expression in simplified form? (v22)(5v2)

elixir [45]

Answer:

5v24

Step-by-step explanation:

(v22)(5v2) = 5v(2+22) = 5v24

3 0

3 years ago