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Charra
1 month ago
15

Marvin wants to purchase a rectangular rug. It has an area represented by the expression 4x^2+64x+256. what is the length and wi

dth. also what do the factors in the factored expressions represent
Mathematics
2 answers:
tester [12.3K]1 month ago
6 0

Length = x + 8

Width = x + 8

Explanation:

Provided:

4x² + 64x + 256 = 0

Dividing by 4 gives us:

x² + 16x + 64 = 0

x² + 8x + 8x + 64 = 0

x(x + 8) + 8 (x + 8) = 0

(x + 8)(x + 8) = 0

Length = x + 8

Width = x + 8

The rectangle’s area is derived from length multiplied by width. Thus, the factors represent length and width.

Inessa [12.5K]1 month ago
6 0

Length = 2x+16\\Breadth=2x+16

Additionally, the factors found in the factored forms signify the rectangle's length and width.

Detailed explanation:

Here we have Marvin who intends to buy a rectangular rug. The area is expressed as 4x^2 + 64x + 256. We need to determine the dimensions. Also, we should clarify what the factors in the expressed form signify. Let's analyze:

The area expression is 4x^2+64x+256, Let’s factor this

⇒ 4x^2+64x+256

⇒ 4x^2+32x+32x+256

⇒ 2x(2x+16)+16(2x+16)

⇒ (2x+16)(2x+16)

Knowing that the area of a rectangle equals length(breadth), we can compare it to the above equation and derive:

Length = 2x+16\\Breadth=2x+16

Additionally, the factors in the factored forms signify the rectangle's length and width.

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An ANOVA procedure is applied to data obtained from 6 samples where each sample contains 20 observations. The degrees of freedom
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Answer:

C. 5 degrees of freedom for the numerator and 114 for the denominator

Step-by-step explanation:

Analysis of variance (ANOVA) is utilized to examine the variations among group means within a sample.

The sum of squares represents the cumulative square of variation, which refers to the deviation of each individual value from the grand mean.

Assuming there are 6 groups and each group contains j=1,\dots,20 individuals, the variation can be calculated using the following formulas:

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

SS_{between}=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

This also has the property

SST=SS_{between}+SS_{within}

The numerator's degrees of freedom in this case is given by df_{num}=df_{within}=k-1=6-1=5 where k = 6 represents the number of groups.

The denominator's degrees of freedom in this scenario is indicated by df_{den}=df_{between}=N-K=6*20-6=114.

The total degrees of freedom would be df=N-1=6*20 -1 =119.

Thus, the appropriate answer would be 5 degrees of freedom for the numerator and 119 degrees of freedom for the denominator.

C. 5 numerator and 114 denominator degrees of freedom

8 0
2 months ago
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