What is the best estimate of the product 289 and 7?

X+y=-4 x-y=2 use elimination with adding and subtraction

Collin did the work to see if 10 is a solution to the equation r/4=2.4

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