Please help I’ll give brainliest
What is a minimum of 3 examples for Systems of equations?

Avariable that is positioned between the independent variable and the dependent variable but does not interact with either to affect the relationship between them is called a variable. select one: a. moderating b. spurious c. mediating d. causal

Firms use marginal analysis to determine prices by a) changing prices in accordance with information from retailers. b) using comparisons with strong competitors to position prices accordingly. c) examining the effect on revenue of small changes to the price of one item. d) trying to minimize production costs by using better and more efficient methods.

Which of the following entities ensure that national security policies are carried out? check all that apply.