Answer:
a. x is the width of the fence in feet and y is the length of the fence in feet , f = 2x+ 2y equation represents that the fence is twice the width and twice the length , x>10 represents that the width should be atleast 10 feet , y >8 represents that the length should be at least 8 feet , 3f<120 represents the cost constraint. it says that the fencing cost $3 per foot and should cost less than or equal to 120 . b. yes, i agree. this is because the inequality f>0 implies that the length of the fencing should be greater than 0. I hope this helps ! :)