Solution:
Let
the first expression means square the number with the tilde and then divide the result by 2.
The second expression means add 3 to the number inside the rectangle.
according to that, the expression:
is equivalent to:
[tex]\frac{6^2}{2}\text{ }\div\text{ 6+3 = 18 }\div\text{ 9 = 2}[/tex]
thus, k tilde-rectangle is equal to:
[tex]\frac{2^2}{2}\text{ +3 = }5[/tex]
so that, the correct answer is:
[tex]5[/tex]
