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2 years ago

5x + 6 = 5x - 4 does it have an unique solution

Mathematics

2 answers:

zubka84 [21]2 years ago

8 0

Answer:

No, it does not.

Step-by-step explanation:

As if we attempted to solve for x, 5x & 5x will both cross each other out. There are no values of x that make the equation true.

Triss [41]2 years ago

6 0

Answer:

Step-by-step explanation:

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What is the factored form of the polynomial?

mihalych1998 [28]

Step-by-step explanation:

The answer is A. (x - 4)(x - 12).

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2 years ago

In the Sahara Desert one day it was 136 degrees. In the Gobi Desert a temperature of -50 degrees was recorded. What is the diffe

Vlada [557]

136 - (-50)= 186
186 is the difference between the too temperatures.

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3 years ago

Solve the equation<br> Solve 3=-(-4+6)

katovenus [111]

3=-1(-4+6)
pemdas
inside parenthasees first
-4+6=2

3=-1(2)
3=-2
false

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3 years ago

How do I get this question started

vampirchik [111]

Answer:

you can search up apps that give you answers and there are apps that can help you

Step-by-step explanation:

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2 years ago

Suppose a baker claims that the average bread height is more than 15cm. Several of this customers do not believe him. To persuad

laila [671]

Answer:

$17-2.262\frac{1.9}{\sqrt{10}}=15.641$

$17+2.262\frac{1.9}{\sqrt{10}}=18.359$

So on this case the 95% confidence interval would be given by (15.641;18.359)

And since the lower limit for the confidence interval is higher than 15 we can conclude that at 5% of significance the true mean is higher than 15 cm

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X=17$ represent the sample mean

$\mu$ population mean (variable of interest)

s=1.9 represent the sample standard deviation

n=10 represent the sample size

Confidence interval

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

In order to calculate the critical value $t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=10-1=9$

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,9)".And we see that $t_{\alpha/2}=2.262$

Now we have everything in order to replace into formula (1):

$17-2.262\frac{1.9}{\sqrt{10}}=15.641$

$17+2.262\frac{1.9}{\sqrt{10}}=18.359$

So on this case the 95% confidence interval would be given by (15.641;18.359)

And since the lower limit for the confidence interval is higher than 15 we can conclude that at 5% of significance the true mean is higher than 15 cm

4 0

2 years ago