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3 years ago

Simplify. 5√7+√7−2√7 4√7 3√21 3√7 4√21

Mathematics

2 answers:

DedPeter [7]3 years ago

7 0

The answer is A.

The 4 and 7 with the object in the middle that I forgot the name of

vitfil [10]3 years ago

5 0

The answer for this question is A

Hope I Helped Please thanks and rate

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Please answer this question based on the following data. SSTR = 6,750 H0: μ1= μ2=μ3=μ4 SSE = 8,000 Ha: at least one mean is diff

Nookie1986 [14]

Answer:

$P_v =P(F_{3,16}>4.5)=0.0180$

So on this case the best option for the answer would be:

between .01 and .025

Step-by-step explanation:

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 $4$ groups and on each group from $j=1,\dots,5$ we have $5$ individuals on each group we can define the following formulas of variation:

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

$SS_{between=Treatment}=SS_{model}=\sum_{j=1}^p n_j (\bar x_{j}-\bar x)^2 =6750$

$SS_{within}=SS_{error}=\sum_{j=1}^p \sum_{i=1}^{n_j} (x_{ij}-\bar x_j)^2 =8000$

And we have this property

$SST=SS_{between}+SS_{within}=6750+8000=14750$

The degrees of freedom for the numerator on this case is given by $df_{num}=k-1=4-1=3$ where k =4 represent the number of groups.

The degrees of freedom for the denominator on this case is given by $df_{den}=df_{between}=N-K=20-4=16$ .

And the total degrees of freedom would be $df=N-1=20 -1 =19$

We can find the $MSR=\frac{6750}{3}=2250$

And $MSE=\frac{8000}{16}=500$

And the we can find the F statistic $F=\frac{MSR}{MSE}=\frac{2250}{500}=4.5$

And with that we can find the p value. On this case the correct answer would be 3 for the numerator and 16 for the denominator.

$P_v =P(F_{3,16}>4.5)=0.0180$

So on this case the best option for the answer would be:

between .01 and .025

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4 years ago

Use the Distributive Property to rewrite 5(15 + x).

liq [111]

Answer:

The answer is -15x-10

Step-by-step explanation:

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3 years ago

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What is the fraction ten twelfths in it's simplest form ?

Julli [10]

5/6 is the answer for your question

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4 years ago

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What is 2.5+0.15p=0.4p

Sonbull [250]

P = 10

Explanation:
Combine like terms: -0.25p = -2.5
Divide both sides: by -0.25
Solution: p = 10

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4 years ago

What is 1/3 multiply 2/4

Greeley [361]

Answer:

1/3 * 2/4 = 1/3 * 1/2 = (1*1)/(3*2) = 1/6

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