Which equation illustrates the commutative property of addition? a. 12 + 6 + 15 = 12 + 15 + 6 b. 12 + 6 + 15 = 12 + (6 + 15) c. 12 + 6 + 15 = 18 + 15 d. 12 + 6 + 15 = 12 + 6 + 15

What is the length of the unknown leg in the right triangle ?

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.