Given the two polygons are similar and have a scale factor of 5:6, solve for x.

Answer:
x = 8
Step-by-step explanation:
We assume the polygon that looks smaller is smaller. Then ...
3x+11 = (5/6)(42) . . . . . relation between corresponding sides
3x +11 = 35 . . . . . . simplify
3x = 24 . . . . . subtract 11
x = 8 . . . . divide by 3