Find the point in the first octant where the tangent plane to x2+116y2+14z2=1 is parallel to the plane x+y+z=10

Given: pqrs is a parallelogram prove: pr and qs bisect each other at t

Jenny earned a 77 on her most recent test jenny score is no less then 5 points greater then 4/5 of terrance’s score if t represents terrance score which inequality represents the situation

Solve the system of equations. x=-2y+1 and x+2y=9. show work