Two toy companies are being compared with respect to the time it takes them to build a popular wooden train set. The study is interested in determining whether there is a difference in the variability between the two toy companies production times. They wish to conduct the hypothesis test using an alpha = 0.05. If random samples of 20 train sets are selected from each toy company, what is the appropriate F critical value? 2.526 2.938 2.124 2.168

answer: i'm great at algebra

~coco

step-by-step explanation:

x = -5

step-by-step explanation:

step-by-step explanation:

the polynomial is a perfect square trinomial of the form a^2-2ab+b^2:

option a. true

step-by-step explanation:

9x^2-12x+4

comparing with the form a^2-2ab+b^2

1.) a^2=9x^2

solving for a: square root both sides of the equation:

sqrt(a^2)=sqrt(9x^2)

a=sqrt(9) sqrt(x^2)

a=3x

2.) b^2=4

solving for b: square root both sides of the equation:

sqrt(b^2)=sqrt(4)

b=2

to be a perfet square trinomial 2ab must be equal to 12x. let's check:

2ab = 2 (3x) (2)

2ab = 12x

correct