1. 11x + 7x = 8x
2. 15y - 20y = -5y
Finding x.
Suzette ran = x
Suzette biked = 4x
7 = x + 4x --) 7 = 5x --) 1.4 = x
Suzette ran for 1.4 hours
Finding y.
Quickest way is to use Suzette biked = 4x and substitute the x for 1.4 to find how much she biked.
4 x 1.4 = 5.6
1.4 + 5.6 = 7 hours the total time exercising
And the mileage adds up to.
5(1.4) + 20(5.6) = 119
Step-by-step explanation:
the fence = the perimeter of the rectangle = 200 ft.
and the perimeter of a rectangle is
perimeter = 2×length + 2×width
length = width + 2
so,
200 = 2×(width + 2) + 2×width = 2×width + 4 + 2×width
196 = 4×width
width = 196/4 = 49 ft
Answer:
E. None of the above answers is correct
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 groups and on each group from we have individuals on each group we can define the following formulas of variation:
And we have this property
The degrees of freedom for the numerator on this case is given by where k =5 represent the number of groups.
The degrees of freedom for the denominator on this case is given by .
And the total degrees of freedom would be
On this case the correct answer would be 4 for the numerator and 95 for the denominator.
E. None of the above answers is correct