PLEASE HELP!! If p(6,-2), q(-2,8), r(-4,3) and s(-9,y), find the value of y so that PQ is perpendicular to RS.

The focus of parabola is (-4, -5), and its directrix is y= -1. fill in the missing terms and signs in parabolas equation in standard form

What 8/12+8/11 in another way than and improper fraction

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.