One dozen eggs were purchased for $.89 how much do 4 eggs cost?

2x minus y equals 6, x plus y equals negative 3

Over the course of a month, a person's weight decreases. what type of relationship is this? a. positive relationship

Parabolas y=−2x^2 and y=2x^2+k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.