when rounding numbers: if it's four or less, you round down. if it's five or more, you round up. 9 is bigger than 4, so the nearest whole number is 830.
Hi,
Equation:

Simplify:
Multiply the terms with the same base by adding their exponents.

Hope this helps.
r3t40
Answer:
C
Step-by-step explanation:
-4+(-5)=-9
-4=-9+5
-4=-4......correct