match each item in column a to an answer in column b.
what property is shown by the equation?
column a
1.–(–33 + 18) = 33 + (–18)
2.–10 + (–15) = –15 + (–10)
3.4 + (29 + 16) = 4 + (16 + 29)
4.–12 + (12 + 27) = (–12 + 12) + 27
column b
a. commutative property
b. associative property
c. opposite of a sum property

Which term best describes the association between variables a and b? no association a negative linear association a positive linear association a nonlinear association a scatterplot with an x axis labeled, variable a from zero to ten in increments of two and the y axis labeled, variable b from zero to one hundred forty in increments of twenty with fifteen points in a positive trend.

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

According to the 2008 u. s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.