True, all of them represent a negative number, for example:
You have $60 and you spent $10, the remaining money is:

Your savings are $1000 and you make a Withdrawal of $500:

In other words for calculation purposes, they all have negative values
Answer:

Step-by-step explanation:
<h3>to understand this</h3><h3>you need to know about:</h3>
<h3>given:</h3>
<h3>to find:</h3>
<h3>tips and formulas:</h3>
<h3>let's solve:</h3>



Answer:
2nd option:
8x+2y=32
x+y=7
Step-by-step explanation:
F(x+2)= -x^2 -4. Use basic transformations