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3 years ago

Someone help me I have have like 5 questions if you answer them all you’ll get brainlest;) 1/5

Mathematics

1 answer:

AysviL [449]3 years ago

6 0

Answer:

We conclude that the list which

shows values in order from LEASE to GREATEST is:

$\frac{49}{16}$ , $\frac{80}{19}$ , $\sqrt{25}$

Step-by-step explanation:

Given the values

$\sqrt{30}=5.477$

$\frac{49}{16}=3.0625$

$\frac{80}{19}=4.210$

$\sqrt{25}=5$

Writing all the values from LEASE to GREATEST

3.0625, 4.210, 5, 5.477

$\frac{49}{16}$ , $\frac{80}{19}$ , $\sqrt{25}$ , $\sqrt{30}$ ,

Therefore, from the given answer options, we conclude that the list which

shows values in order from LEASE to GREATEST is:

$\frac{49}{16}$ , $\frac{80}{19}$ , $\sqrt{25}$

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What value added to x2 − 8x would complete the square?

Mazyrski [523]

X^2 - 8x = (x - 4)^2 - 16

we add 16 to give x^2 - 8x + 16 which is a perfect square

x^2 - 8x + 16 = (x - 4)^2

answer is 16

7 0

3 years ago

Read 2 more answers

What is the solution to 4(x-1)-2(3x+5)=-3x-1

Margarita [4]

To solve this problem, we need to get the variable x alone on one side of the equation. To begin, we are going to use the distributive property twice on the left side of the equation to expand the multiplication and get rid of the parentheses.

4(x-1) - 2(3x + 5) = -3x -1

4x - 4 -6x - 10 = -3x - 1

Next, we should combine like terms on the left side of the equation. This means we should add/subtract the variable terms and the constant terms in order to simplify this equation further.

-2x - 14 = -3x - 1

Then, we have to add 3x to both sides of the equation to get the variable terms all on the left side of the equation.

x - 14 = -1

After that, we should add 14 to both sides of the equation to get the variable x alone one the left side of the equation.

x = 13

Therefore, the answer is 13.

Hope this helps!

4 0

3 years ago

Read 2 more answers

HELP ME PLEASE !!!!!!!!!!!!!!!!!!!!!!!!!!!

scoray [572]

7x-3=60
7x=63
x=9

11y+5=60
11y=55
y=11

hope this helps!!!

5 0

3 years ago

A confidence interval was used to estimate the proportion of statistics students that are female. A random sample of 72 statisti

jeyben [28]

Answer:

We need a sample of size at least 13.

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:

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

90% confidence interval: (0.438, 0.642).

The proportion estimate is the halfway point of these two bounds. So

$\pi = \frac{0.438 + 0.642}{2} = 0.54$

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 $Z = 1.96$ .

Using the information above, what size sample would be necessary if we wanted to estimate the true proportion to within ±0.08 using 95% confidence?

We need a sample of size at least n.

n is found when M = 0.08. So

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

$0.08 = 1.96\sqrt{\frac{0.54*0.46}{n}}$

$0.08\sqrt{n} = 1.96\sqrt{0.54*0.46}$

$\sqrt{n} = \frac{1.96\sqrt{0.54*0.46}}{0.08}$

$(\sqrt{n})^{2} = (\frac{1.96\sqrt{0.54*0.46}}{0.08})^{2}$

$n = 12.21$

Rounding up

We need a sample of size at least 13.

3 0

3 years ago

A poll that does not attempt to generate a random sample, but instead invites people to volunteer to participate is called:_____

Helga [31]

Answer:

Self selection sampling.

Step-by-step explanation:

A poll that does not attempt to generate a random sample, but instead invites people to volunteer to participate is called - self selection sampling.

Self-selection sampling is a sampling method where researchers allow the people or individuals, to choose to take part in research on their own accord.

6 0

3 years ago