What is the result of subtracting the second equation from the first?
-2x + 7y = 10
3x + 7y = 2

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.

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?