What is two thirds -3/7 answer in simplest form

Which is the graph of this function 3 square root of x plus one if

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

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me