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kenny6666 [7]
4 years ago
11

Use the square root property to solve (x+8)2 = 9

Mathematics
1 answer:
Alexeev081 [22]4 years ago
7 0

Answer: x = -5 x = -11

Step-by-step explanation:

(x+8)^2=9

Square root both sides of the equation - x+8=3

Move the 8 to the other side - x= -8+-3

-8+3 = -5

-8-3 = -11

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Answer:

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3 years ago
Read 2 more answers
The distribution of the test statistic for analysis of variance is the F-distribution. true or false
lubasha [3.4K]

Answer:

True. See explanation below

Step-by-step explanation:

Previous concepts

Analysis of variance (ANOVA) "is used to analyze the differences among group means in a sample".  

The sum of squares "is the sum of the square of variation, where variation is defined as the spread between each individual value and the grand mean"  

If we assume that we have k groups and on each group from j=1,\dots,k we have k individuals on each group we can define the following formulas of variation:  

SS_{total}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x)^2  

SS_{between=Treatment}=SS_{model}=\sum_{j=1}^p n_j (\bar x_{j}-\bar x)^2  

SS_{within}=SS_{error}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x_j)^2  

And we have this property  

SST=SS_{between}+SS_{within}  

The degrees of freedom for the numerator on this case is given by df_{num}=k-1 where k represent the number of groups.  

The degrees of freedom for the denominator on this case is given by df_{den}=df_{between}=N-k.  

And the total degrees of freedom would be df=N-1

And the we can find the F statistic F=\frac{MSR}{MSE}

8 0
3 years ago
Please help.... fast​
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Answer:

<h2>HL</h2>

Step-by-step explanation:

It tells you the triangle is a right triangle and it tells you that the hypotenuse of both triangles is congruent.

I'm confident that this is the answer.

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A student needs to earn 80 points on the test in order to keep an A grade for the semester. Write an equation that represents th
Annette [7]
The most simple way is to get 8 questions right on a ten question test. 8q/10q = 80%.
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