Solve the formula y = mx + b for m. a. (y minus b) x c. StartFraction y minus b Over x EndFraction b. y minus b minus x d. StartFraction y Over x EndFraction minus b

The pyraminx is a rubik's cube-type toy in the shape of a tetrahedron. the pyraminx shown below has edges 15\,\text{cm}15cm long and vertical height h=12.2\,\text{cm}h=12.2cm. the triangle drawn with dashed lines is a right triangle. what is the distance rr? round your answer to the nearest tenth.