Question

20. Let tilde x = x^ 2 2 , and boxed y =y+3 . If tilde 6 / boxed 6 =k , then boxed k =A. 5B. 8C.9D.12

Answer 1

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:

$\frac{6^2}{2}\text{ }\div\text{ 6+3 = 18 }\div\text{ 9 = 2}$

thus, k tilde-rectangle is equal to:

$\frac{2^2}{2}\text{ +3 = }5$

so that, the correct answer is:

$5$