do I just have to find the sum?
Those are positive numbers.
Those that are less than zero are called negative numbers.
Zero itself can be considered both, or neither.
One polynomial identity that crops up often in various areas is the difference of squares identity:
A2-b2=(a-b) (a+b)
We meet this in the context of rationalising denominators.
Answer:
$856
Step-by-step explanation:
Find 7% of $800 and then add it to $800
