Geometry circle - find the midsing angle

9/10 divide by -3/15 as a mixed number

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c

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.