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makkiz [27]
4 years ago
14

Please Help!!

Mathematics
1 answer:
klio [65]4 years ago
7 0

Answer:

  • cd = 34
  • d = 1/2

Step-by-step explanation:

(a) When two quantities vary inversely, their product is the constant of variation:

  d = k/c   →   cd = k

For d=17 and c=2, k = 2·17 = 34

Then the equation can be written as ...

  cd = 34 . . . or . . . d = 34/c

__

(b) d = 34/68 = 1/2 . . . . . put c=68 into the above equation to find d

For c=68, d=1/2.

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X ÷ -6 = 10 what is x?​
Ostrovityanka [42]

Answer:

x=-60

Step-by-step explanation:

convert to  x over -6  =10

multiply both side by -6, write as x(-6) over -6= 10(-6)

simplify making x=-60

3 0
3 years ago
Read 2 more answers
A rental car company has noticed that the distribution of the number of miles customers put on rental cars per day is skewed to
kodGreya [7K]

Using the Central Limit Theorem, the correct option is:

(c) Average number of miles put on a rental car per day across 25 customers.

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

The Central Limit Theorem states that, for a normally distributed variable X, with mean \mu and standard deviation \sigma, the sample means of size m are approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

  • The interpretation related to this problem is that the larger the sample size, the smaller the standard deviation.
  • Thus, among the options, the largest sample is 25, thus, option c will have the smallest standard deviation.

A similar problem is given at brainly.com/question/23088374

5 0
2 years ago
If a manufacturer conducted a survey among randomly selected target market households and wanted to be 95​% confident that the d
katen-ka-za [31]

Answer:

We need a sample size of least 119

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.

Sample size needed

At least n, in which n is found when M = 0.09

We don't know the proportion, so we use \pi = 0.5, which is when we would need the largest sample size.

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

0.09 = 1.96\sqrt{\frac{0.5*0.5}{n}}

0.09\sqrt{n} = 1.96*0.5

\sqrt{n} = \frac{1.96*0.5}{0.09}

(\sqrt{n})^{2} = (\frac{1.96*0.5}{0.09})^{2}

n = 118.6

Rounding up

We need a sample size of least 119

6 0
3 years ago
In ΔPQR, what is the m∠Q? Enter your answer in the box.
Orlov [11]

Answer:

105°

Step-by-step explanation:

11x-5 + 6x+5 + x = 180

18x = 180

x = 10

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8 0
3 years ago
PLEASE HELP ME!! It’s due
tatyana61 [14]

Answer:

dont cheat

Step-by-step explanation:

cheaters never win bro

5 0
3 years ago
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