Triangular numbers can be represented with equilateral triangles formed by dots. the first five triangular numbers are 1,3,6,10,and 15. is there a direct variation between a triangular number and it's position in the sequence? explain your reasoning.

Aline passes through 3,7 and 6,9 what equation represents the line

Solve -.016x= -16. need solving this

Jack has a rectangular piece of land, the area of which is represented by a1 = 9.5l. his brother has a different rectangular piece of land, the area of which is represented by a2 = l(14 − l). let a represent the area in square meters and l represent the length in meters of the pieces of land. the two equations plotted on a graph meet at a point as shown in the image