Respuesta :

altavistard

Answer:

L = 11 m

Step-by-step explanation:

The perimeter is 40 m, which in turn equals 2L + 2W.  With W = 9 m, we have:

40m = 2L + 2(9 m), or   40 m = 2L + 18 m, or 22 m = 2L.  Then L = 11 m.


ToothLin
p = w + w + l + l
40 = 9 + 9 + l + l
40 = 18 + 2l
22 = 2l
11 = l
the length is 11