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antoniya [11.8K]
3 years ago
12

Rational Exponents (See attachments)

Mathematics
1 answer:
Contact [7]3 years ago
6 0

Answer:

I cant read the handwriting sorry

Step-by-step explanation:

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Plzzz help meeeeeeee
velikii [3]
The correct answer is x = 2.
5 0
4 years ago
Find the value of x.<br> (7x - 3)
Musya8 [376]

Answer:

Infinity Many

Step-by-step explanation:

x can pretty much be any number possible. It will just equal something different every time.

8 0
4 years ago
Alex and Peter win some money and share it in the ratio 3:5. Alex gets £33. How much did Peter get?
IgorLugansk [536]

Answer:

Step-by-step explanation:

Set it up as fractions, Alex over Peter.

3/5 : 33/x  Let x represent Peter's amount.  Now find out: how do you get from 3 to 33?  What times 3 equals 33?  11

What you do on the top, you must do on the bottom.  If 3 times 11 equals 33, then 5 times 11 equals x.  5 times 11 equals 55, so x equals 55.

Peter will get 55.  Don't forget the pound symbol.

5 0
3 years ago
You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on con
AlladinOne [14]

Using the z-distribution, a sample size of 180 is needed for the estimate.

<h3>What is a z-distribution confidence interval?</h3>

The confidence interval is:

\overline{x} \pm z\frac{\sigma}{\sqrt{n}}

The margin of error is given by:

M = z\frac{\sigma}{\sqrt{n}}

In which:

  • \overline{x} is the sample mean.
  • z is the critical value.
  • n is the sample size.
  • \sigma is the standard deviation for the population.

In this problem, we have a 98% confidence level, hence\alpha = 0.98, z is the value of Z that has a p-value of \frac{1+0.98}{2} = 0.99, so the critical value is z = 2.327.

The population standard deviation is of \sigma = 23, and to find the sample size, we have to solve for n when M = 4.

Hence:

M = z\frac{\sigma}{\sqrt{n}}

4 = 2.327\frac{23}{\sqrt{n}}

4\sqrt{n} = 2.327 \times 23

\sqrt{n} = \frac{2.327 \times 23}{4}

(\sqrt{n}) = \left(\frac{2.327 \times 23}{4}\right)^2

n = 179.03.

Rounding up, as a sample size of 179 would result in an error slightly above 4, a sample of 180 is needed.

More can be learned about the z-distribution at brainly.com/question/25890103

#SPJ1

8 0
2 years ago
I need help what is the awncer
castortr0y [4]

Answer:

6.44 square meters

Step-by-step explanation:

To solve for area of a rectangle, multiply the length by the width.

2.3 \times 2.8   = 6.44

8 0
3 years ago
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