Respuesta :

Answer:

12

Step-by-step explanation:

Create a ratio

AB : DE

5 : 4

BC : EF

15: x

5/4 = 15/x

5x = 15*4

5x = 60

x = 12

EF = 12

rana75
It’s 12=C because you have to multiply 15 and 4, then divide by 5 which equals 12. Please mark me as a brainiest