Respuesta :
The width is 5. The formula is 2l+2w. If the length is 4 the width must be 5
2(4) + 2(5)= 18
8+10=18
18=18
2(4) + 2(5)= 18
8+10=18
18=18
Answer:5
Step-by-step explanation:
2 x length + 2 x width = perimeter of rectangle.
you know the total is 18
(2 x 4) x 2w = 18
8 x 2w = 18
2w = 10
w = 5