I believe 10.42 if you add try this if its not on their try dividing by 2
Answer:
just graph the line: y=4x-12
Step-by-step explanation:
The diagnonals of a parallelogram bisect each other ,
so
=》 BD = 3x × 2
=》BD = 6x
and there's given that
=》

=》

=》

=》

so, if x = 4 , then the given quadrilateral is a parallelogram.