D. You want it to be eye catching to the audience, but you also want it to be relevant to the subject you're talking about. A long title may bore the audience.
<span>Parentheses enclose added material.
Parentheses enclose numerical figures that confirm written numbers.
Parentheses enclose explanatory material.
A parenthetic expression is a group of words, an idea, that is not closely related to the rest of the sentence.
It's important to note that parentheses are used for additional explanatory information, not for main ideas or important information.</span>
What do you mean what happend
If "y" represents the monthly salary of a salesman then we can rearrange the equation so that "y" is in evidence:
y=2000+100x
If he sells no computers and "x" is the number of computer systems he sells, then x=0.
y=2000+100*0 <=> y=2000+0 <=> y=2000
If the salesman sells no computers, his monthly salary is of 2000.
