The length of a rectangle is 4cm longer than the width, and the perimeter is at least 48cm. What are the smallest possible dimensions of the rectangle

So since the length is 4+w. Then the perimeter 2 (4+w) + 2w > = 48.

so, 8+2w+2w>=48.

8+4w>=48

4w>=40

w>=10

so, the width must be at least 10. And the smallest dimensions can be 10 x 14.