How do I graph -2y+x=2y-8

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi

Scenario: a rectangular plot of ground is 5 meters longer than it is wide. its area is 20,000 square meters. question: what equation will you find the dimensions? note: let w represent the width. options: w(w+5)=20,000 w^2=20,000+5 (w(w+5))/2=20,000 w+2(w+5)=20,000