The perimeter of a rectangle is 408 yards the height is 3 times the width which equation could be used to find the width?

Answer pls man im trying to get out of summer school

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

What are the intercepts of x^2+y-9=0