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Akimi4 [234]
3 years ago
5

0.2x+2.7x−8.1=6.9+1.1x plz help 25 points on the line

Mathematics
1 answer:
ololo11 [35]3 years ago
6 0

Answer:

Step-by-step explanation:

0.2x + 2.7x - 8.1 = 6.9 + 1.1x

0.2x + 2.7x - 1.1x = 6.9 + 8.1

1.8x = 15

x = 15/1.8

x = 8.33

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alexandr402 [8]

this is how i calculated for x!

7 0
2 years ago
A survey of 865 voters in one state reveals that 408 favor approval of an issue before the legislature. Construct the 95% confid
katrin [286]

Answer:

The 95% confidence interval for the true proportion of all voters in the state who favor approval is (0.4384, 0.5050).

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:

n = 865, \pi = \frac{408}{865} = 0.4717

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}} = 0.4717 - 1.96\sqrt{\frac{0.4717*0.5283}{865}} = 0.4384

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4717 + 1.96\sqrt{\frac{0.4717*0.5283}{865}} = 0.5050

The 95% confidence interval for the true proportion of all voters in the state who favor approval is (0.4384, 0.5050).

6 0
3 years ago
For every 10 flowers,there are 36 butterflies resting on the flower with the same number on each flower .How many butterflies ar
Gemiola [76]

Answer:

I don't know if this is right or not, but here's what I think.

There are 36 butterflies on each flower.

Step-by-step explanation:

<u>Question:</u>

For each 10 flowers, there are <u>36 butterflies resting on the flower</u> with the same number on each flower. How many butterflies are on one flower​?

3 0
3 years ago
HELP PLZZZZZ !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Neporo4naja [7]

Answer: I think it’s  A because 8x5=40

Step-by-step explanation:

7 0
3 years ago
Use the spinner below to determine the the probability of each of the events. Make sure you write fractions in the form of #/# w
Helga [31]

Answer:

We need a picture to help you. I'm sorry :(

3 0
3 years ago
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