Answer:
The value of XZ is equal to 156 units.
Step-by-step explanation:
Given that,
Quadrilateral WXYZ is a rectangle, WY = 2w, and XZ = w + 78
The diagonals of a rectangle are equal. So,
WY = XZ
2w = w+78
2w-w = 78
w = 78
So,
XZ = w + 78
= 78+78
= 156 units
So, the value of XZ is equal to 156 units.