The length of a rectangle is 3cm. If the length remains constant, and the width changes, what r the possible perimeters for the different rectangles?
well, assuming that the width remains less than the length, then 0 < w < 3
p = 2l + 2w
p = 6 + 2w
6 + 0 < p < 6 + 6
6 < p < 12