Evaluate the expression when:

a = 6, b = 2, and c = 4

3a + 40 - 6b

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.

Ineed with number 6 , explain how to get 1978

Can someone me with these two circle theorem questions asap?