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sertanlavr [38]
3 years ago
9

I really need help!!!!ASAP!!!Will mark as brainest!!!(Feel free to explain how you got your answer! :)

Mathematics
1 answer:
katovenus [111]3 years ago
5 0
A. Since the ribbons come in rolls of 15, we need groups of 15 yards. Since we are told that we have 322 yards. We have to find a way to express this number into groups of 15. To do that we can simply divide. 322 /15 = 21.466... since we can’t have one fourth of a role, we have to buy a whole one to be able to get that .4. So, Quincy needs 22 roles.

B. Twice means two times something. So all you do is multiply 322( the number of yards Quincy needs) times 2 = 644. Alice needs 644 yards of ribbon.

C. All you have to do is break 285 yards into 3 groups so: 285/3= 95. So, Elena needs 95 yards of yellow, 95 yards of red, and 95 yards of blue.

Hope this helped and pls mark as brainliest!

~ Luna
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Rationalise the denominator.<br>1/√5+√2​
Pani-rosa [81]

Answer:

Exact Form:

  √5 + 5√2

__________

       5

Decimal Form:

1.86142715

…

Step-by-step explanation:

N/A

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A survey asked whether respondents favored or opposed the death penalty for people convicted of murder. Software shows the resul
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Answer:

The 95% confidence interval for those opposed is: (0.298, 0.334).

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}.

For this problem, we have that:

1786 of the 2611 were in favor, so 2611 - 1786 = 825 were opposed. Then

n = 2611, \pi = \frac{825}{2611} = 0.316

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.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.316 - 1.96\sqrt{\frac{0.316*0.684}{2611}} = 0.298

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.316 + 1.96\sqrt{\frac{0.316*0.684}{2611}} = 0.334

The 95% confidence interval for those opposed is: (0.298, 0.334).

4 0
3 years ago
Line segment NY has endpoints N(-11, 5) and Y(3,-3).
777dan777 [17]

Given:

Line segment NY has endpoints N(-11, 5) and Y(3,-3).

To find:

The equation of the perpendicular bisector of NY.

Solution:

Midpoint point of NY is

Midpoint=\left(\dfrac{x_1+x_2}{2},\dfrac{y_1+y_2}{2}\right)

Midpoint=\left(\dfrac{-11+3}{2},\dfrac{5-3}{2}\right)

Midpoint=\left(\dfrac{-8}{2},\dfrac{2}{2}\right)

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Slope of lines NY is

m=\dfrac{y_2-y_1}{x_2-x_1}

m=\dfrac{-3-5}{3-(-11)}

m=\dfrac{-8}{14}

m=\dfrac{-4}{7}

Product of slopes of two perpendicular lines is -1. So,

m_1\times \dfrac{-4}{7}=-1

m_1=\dfrac{7}{4}

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y=\dfrac{7}{4}x+8

Therefore, the equation of perpendicular bisector of NY is y=\dfrac{7}{4}x+8.

6 0
2 years ago
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otez555 [7]
So work =time times rate or W=TR

so T=m-k
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Answer:  

             

Step-by-step explanation:

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