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tigry1 [53]
2 years ago
8

I need help please :,(

Mathematics
1 answer:
Ede4ka [16]2 years ago
4 0
I think it’s the first one
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What is the value of x if 5^x+2=5^9?
Mkey [24]

In this equation, x = 7.


In order to solve this you are going to need to use logarithmic functions. By taking a logarithm you can eliminate exponents.


5^{x + 2}  = 5^{9}


First we're going to take the logarithm of both sides, which allows us to put the exponents in front of the terms.


(x + 2)Log5 = 9Log5


Now that we've done this, we can divide both sides by Log5 and eliminate that term.


x + 2 = 9


From here, we simply need to subtract in order to solve.


x = 7

7 0
2 years ago
17. Paige has 5 more toys than Jordan and 8 more toys than Bill. Altogether, the three friends have 20 toys. How many toys does
Lelechka [254]

trick question, its 7...

Step-by-step explanation:

8 0
2 years ago
Given two dependent random samples with the following results:
Naddik [55]

Answer:

The null hypothesis will not be rejected.

Step-by-step explanation:

The hypothesis for the test is:

<em>H</em>₀: There is no difference between the two population means, i.e. <em>d</em> = 0.

<em>Hₐ</em>: There is a significant difference between the two population means, i.e. <em>d</em> ≠ 0.

Consider the Excel output attached.

The mean of the differences is, \bar d=-2.75.

The standard deviation of the differences is, S_{d}=4.268.

Compute the test statistic as follows:

t=\frac{\bar d}{S_{d}/\sqrt{n}}=\frac{-2.75}{4.268/\sqrt{8}}=-1.82

The degrees of freedom is, n - 1 = 7.

Compute the <em>p</em>-value as follows:

p-value=2\cdot P(t_{7}

The decision rule is:

The null hypothesis will be rejected if the p-value of the test is less than the significance level.

<em>p</em>-value = 0.112 > α = 0.02.

The null hypothesis will not be rejected.

4 0
3 years ago
Identify the sampling techniques​ used, and discuss potential sources of bias​ (if any). Explain.
Snowcat [4.5K]

Answer:

The sampling technique used is the systematic sampling.

Step-by-step explanation:

Systematic sampling as the name implies is the application of a system so select samples, like having a people in a line, and a system is used to select the sample, like counting one to three and picking every third person in the line. This kind of sampling is bias because everyone is not giving equal opportunity of selection.

7 0
2 years ago
The exact same experiment was conducted 14 times. How many times should the results have been similar for them to be valid?A.8
NeTakaya

Answer:

I would have to say C.14

Step-by-step explanation:

Because if you are running the same exact emperiment with the same exact materials everytime then you should get the same outcome.

Hope this helps! : D

4 0
2 years ago
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