Lucía makes braided key chains out of cotton cord. For every 8 feet of cotton cord she has, she can
make 3 braided key chains.
Part A Use a model to represent the relationship
between the feet of cotton cord and the number of
key chains.
Cotton Cord (ft)
8
Key Chains
1
2
3
Part B Use the model to explain how to find the
number of feet of cotton cord Lucía needs to make 5
key chains.

Segment xz is bisected by point y. if xy = 12x, and the measure of xz = 18x – 6, solve for x

Піf x = y and y= z, which statement must be true? оа. -x = -2 b. x= z ос. —x = 2 od. 2= x

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.