This is true.only parallelograms have diagonals that both bisect each other.
So firstly, I would foil 5(2x - 8). 
Next, I would combine like terms: 
Next, I would add 25 on each side: 
Finally, I would divide 10 on each side, and my answer would be x = 1.
Together, the area of the two bases is
(6 in)×(8 in) = 48 in²
The lateral area is the product of the height of the prism (2 in) and the perimeter of the base (6 in +8 in +10 in), so is
(2 in)×(24 in) = 48 in²
The total area is the sum of these
area = 48 in² +48 in² = 96 in² . . . . . . . . . matches the 3rd selection
Two numbers that have an absolute value of 16 is 8.