You go down 8 floors in an elevator. your friend goes up 5 floors in an elevator. what is each amount as an integer

Use complete sentences to differentiate between a regular tessellation, and a pure tessellation. be sure to include specific types of polygons in your explanation.

2x minus y equals 6, x plus y equals negative 3

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.