4. Which of the following systems has an infinite number of solutions? A x+y=1 and x– y=1
B. x+y=1 and x +y=-1
C. x+y=1 and -x - y = -1
D. x+y=1 and x+ y= 2

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