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3 years ago

Make q the subject of the formula p = 2q2

Mathematics

1 answer:

pantera1 [17]3 years ago

8 0

Answer:

q = ± $\sqrt{\frac{p}{2} }$

Step-by-step explanation:

Given

p = 2q² ( divide both sides by 2 )

$\frac{p}{2}$ = q² ( take the square root of both sides )

± $\sqrt{\frac{p}{2} }$ = q

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A bicycle that normally sells for $180 is on sale for 40% off. What is the

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Step-by-step explanation:

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3 years ago

Half of the sum of x and 2

natka813 [3]

Answer:

1/2+2x or 1/2+2+x

Step-by-step explanation:

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4 years ago

Read 2 more answers

An automobile manufacturer would like to know what proportion of its customers are not satisfied by the service provided by the

zheka24 [161]

Answer:

The sample size needed if the margin of error of the confidence interval is to be about 0.04 is 18.

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 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 $Z = 1.96$ .

Past studies suggest this proportion will be about 0.15

This means that $p = 0.15$

Find the sample size needed if the margin of error of the confidence interval is to be about 0.04

This is n when M = 0.04. So

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

$0.04 = 1.96\sqrt{\frac{0.15*0.85}{n}}$

$0.04\sqrt{n} = 1.96\sqrt{0.15*0.85}$

$\sqrt{n} = \frac{1.96\sqrt{0.15*0.85}}{0.04}$

$(\sqrt{n})^{2} = (\frac{1.96\sqrt{0.15*0.85}}{0.04})^{2}$

$n = 17.5$

Rounding up

The sample size needed if the margin of error of the confidence interval is to be about 0.04 is 18.

8 0

3 years ago

Jonah and his friends go apple picking. Jonah fills 5 baskets. Each basket holds 15 apples. If 4 of Jonah's friends pick the sam

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Its easy just do 5x15=75 that's how much Jonah has so far
then another friend has 5 full baskets and each have 15 apples = 75
then again 5x15
then again 5x15
then again 5x15
then last again 5x15
so add 75 4 times = 375 Hope this helps :D

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3 years ago

Mathematics Mh Slope

kirza4 [7]

Answer:

(Option 2) y= x+ 4

Step-by-step explanation:

Please see attached picture for full solution.

To find equation of a line, you need to find the gradient, which is represented by m, and then substitute a coordinate.

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4 years ago