Is number 5 a function or not a function and why?

In the 30-60-90 triangle below side s has a length of and side r has a length

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles

The vertices of a triangle are a(7.5), b(4,2), and c19. 2). what is