Help please I already chose an answer I'm just not sure my answer is correct

Answer:
x = 4.5
Step-by-step explanation:
The segment joining the midpoints of the two sides of a triangle is half the length of the third side, that is
5x = [tex]\frac{1}{2}[/tex] × 45 = 22.5 ( divide both sides by 5 )
x = 4.5