What are the equivalence relation in the set {a, b, c, d} that define the pairs (a, b) and (CD)?

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

Find the coordinates of point x that lies along the directed line segment from y(-8, 8) to t(-15, -13) and partitions the segment in the ratio of 5: 2.