-30-27= -57
When both numbers are negative, they are “added” in a sense, but remain negative.
-5-(-4)= -1
You have to multiply the (-4) by the “invisible” -1 on the outside before you add/subtract.
Answer:
-1
Step-by-step explanation:

Hope this helps!
That would be 1953.08
diameter = <span>circumference/pi, so reverse it and multiply 622 by 3.14</span>