Respuesta :

Answer:

The first piece is 15 in and the second piece is 21 in

Step-by-step explanation:

5 + 7 = 12

3 ft = 3 x 12 in = 36 in

36 ÷ 12 = 3

5 x 3 = 15       7 x 3 = 21

The first piece is 15 in and the second piece is 21 in