Two congruent rhombi share the point of intersection of their diagonals. Shorter diagonals are perpendicular to each other. Prove that the line joining the point of intersection of the diagonals and the midpoint of the side of one rhombus is perpendicular to a side of the other rhombus

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. a new supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which size bag provides the best deal, and how much will you save each month? compare the cost of the new supplier to the current one.

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

Kayaks rent for $35 per day. which expression can you use to find the cost in dollars of renting 3 kayaks for a day?