Answer:
21 is the answer
Step-by-step explanation:
The modulus ar absolute symbol...the two straight lines does not take into consideration the positive or negative signs and the answer always remains positive with the same numbers like in this case it is 21.
Answer:

Step-by-step explanation:
Let

Differentiating y with respect to x

where a and b are constants
An example is n+2 (n being number).
0,2,4,6,8,10...
I assume that you mean the *numeral* 7, the written for of the number in a common font.
<span>This has no symmetry. In an extreme case, with the top extended to be the same length as the slant stroke, and restricting both to simple line segments, *then* you would have symmetry across a line bisecting the angle.</span>