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Solve for x x/10+5=−1

x=​

Answers

Answer 1
Answer:

Answer:

x=-60

Step-by-step explanation:

You solve for x by simplifying both sides of the equation, then isolating the variable.

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Solve by graphingy+5 = 2x3y + 6x = -3

Which best describes vibration?the distance traveled per unit in time
the action of moving back and forth quickly and steadily
the distance between one compression and the compression next to it
the action of moving through a material or substance

Answers

Answer:

the action of moving back and forth quickly and steadily

Explanation:

hopes this helps :D

Consider the following hypothesis test. The following data are from matched samples taken from two populations. Population Element 1 2 1 21 20 2 28 26 3 18 18 4 20 20 5 26 24 Compute the difference value for each element. If your answer is "0", enter 0.a. Compose the difference valuefor each element.b. Compute d.c.Compute the standard deviation sd.d.Conduct a hypothesis test using α=.05.What is yourconclusion?

Answers

Answer:

a) d: 1  2  0  0  2

b) \bar d= (\sum_(i=1)^n d_i)/(n)= (5)/(5)=1

c) s_d =(\sum_(i=1)^n (d_i -\bar d)^2)/(n-1) =1

d) p_v =P(t_((4))>2.236) =0.0445

So the p value is lower than the significance level provided, so then we can conclude that we reject the null hypothesis that the difference mean between population 1 and 2 is less than 0. And we can say that the mean difference is higher than 0 at 5% of significance.  

Step-by-step explanation:

A paired t-test is used to compare two population means where you have two samples in  which observations in one sample can be paired with observations in the other sample. For example  if we have Before-and-after observations (This problem) we can use it.  

Let put some notation  

x=Population 1 , y = population 2

x: 21  28  18  20  26

y: 20 26  18  20  24  

a. Compose the difference valuefor each element

Let d =x-y, so the values for the difference are:

d: 1  2  0  0  2

b. Compute d.

We need the mean for the difference. If we use the following formula we got:

\bar d= (\sum_(i=1)^n d_i)/(n)= (5)/(5)=1

c.Compute the standard deviation sd.

For the standard deviation we can use the following formula:

s_d =(\sum_(i=1)^n (d_i -\bar d)^2)/(n-1) =1

d.Conduct a hypothesis test using α=.05.What is yourconclusion?

If we assume that the system of hypothesis for this case are:

Null hypothesis: \mu_x- \mu_y \leq 0

Alternative hypothesis: \mu_x -\mu_y > 0

We can calculate the statistic given by :

t=(\bar d -0)/((s_d)/(√(n)))=(1 -0)/((1)/(√(5)))=2.236

The next step is calculate the degrees of freedom given by:

df=n-1=5-1=4

Now we can calculate the p value, since we have a right tailed test the p value is given by:

p_v =P(t_((4))>2.236) =0.0445

So the p value is lower than the significance level provided, so then we can conclude that we reject the null hypothesis that the difference mean between population 1 and 2 is less than 0. And we can say that the mean difference is higher than 0 at 5% of significance.  

Final answer:

To complete this hypothesis test, calculate the difference value for each element, compute the sample mean difference (d), calculate the standard deviation (sd), and then conduct the hypothesis test using a significance level of α = 0.05.

Explanation:

To compute the difference value for each element, subtract the second value from the first value for each pair. For example, the difference for the first pair is 1-2 = -1. Repeat this for each pair of elements in the data set.

To compute the sample mean difference (d), add up all the difference values and divide by the total number of pairs. In this case, d = (-1 + 1 + 2 + 0 + 2)/5 = 0.8.

To compute the standard deviation (sd), first calculate the squared difference value for each pair and sum them up. Then divide the sum by (n-1), where n is the total number of pairs. Finally, take the square root of the result. In this case, sd = sqrt(((1-0.8)^2 + (2-0.8)^2 + (0-0.8)^2 + (2-0.8)^2)/4) = 1.32.

For the hypothesis test, we compare the sample mean difference (d) to the population mean difference (μd) under the null hypothesis. The null hypothesis states that there is no difference between the two populations. If the difference between d and μd is statistically significant at a significance level of α = 0.05, we reject the null hypothesis and conclude that there is a significant difference between the two populations. Otherwise, we fail to reject the null hypothesis.

Without information about the population mean difference (μd), we cannot perform the hypothesis test or draw a conclusion.

Learn more about Hypothesis Testing here:

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Given the function f(x) =-2x^2 + 4x -7 find f(-4)

Answers

Correct the answer is -55

Use the distributive property to write an equivalent expression. (6+8)⋅x *

Answers

Answer: 14*x

Step-by-step explanation: I am 99% sure

At which value in the domain does f(x) = 0?
X=-3
X=0
X=1
X=4

Answers

at -3 because you if f(0) that means the x is 0, but if f(x) =0 then for what x value does it the y = 0
so where does the line cross the y axis
at x=-3

What is a rational number

Answers

A rational number is any number, positive or negative. This can be numbers including fractions, decimals, whole numbers, and so on.

As long as it is a real number it's a rational number.

In addition, any number that can be turned into a fraction is rational.

Answer:

A Rational Number can be made by dividing two integers.

Step-by-step explanation:
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