Question 686190
7.5

since AB is 10 that makes XY= x
and you know BC=16 and YZ=12

if you draw out triangles, youll find that AB is to XY as BC is to YZ
simply cross multiply
 
16:12 as 10:x 
set up a fraction
16/12 and 10/x
cross multiply


12x10=120
120/16=7.5
x=7.5