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RSB [31]
3 years ago
8

Plz help for this answer

Mathematics
1 answer:
aleksandr82 [10.1K]3 years ago
6 0

Answer:

wth is up with your workbook answer is 4 i think

Step-by-step explanation:

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Which equation has a solution of x = 9?
GaryK [48]
Answer: 2x-3=15

2(9)-3=15
18-3=15
7 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
Graph the hyperbola x^2/4-y^2/1=1 What is the orientation of the transverse axis
ella [17]

Answer:

The orientation is horizontal.

a=2 and b=1

The center is (0,0).

The vertices are (-2,0) and (2,0).

c^2= 5.

The slope is 1/2.

Step-by-step explanation:

I got them right on edge

5 0
3 years ago
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-16

Step-by-step explanation:

3^2-7(3)-4

8 0
3 years ago
Factorise n² - 11n+ 18
11111nata11111 [884]

Step-by-step explanation:

=n2-11n+18

=n2-(9+2)n+18

=n2-9n-2n+18

=n(n-9)-2(n-9)

=(n-2)(n-9)

6 0
2 years ago
Read 2 more answers
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