Border of the pool means "perimeter".
P = 2L + 2W (L represents length, W represents width)
P = 2(3s) + 2(2s)
P = 6s + 4s
P = 10s
Your answer would be (3,0)
W=15 no
W= 21 no
W= 1 Yes
If im right the question is just asking which variable is less than 15.
so the only variable that is less than 15 is 1.
I count 5. There could be more. Sorry. Don't have scratch paper at the moment.
15 miles/hour x 2/3 hour = 30/3 = 10 miles
