Because without place value you might put the decimal in the wrong place and that will effect the answer big time.
I'll do the math for this, it may take me a few minutes so i will update this comment with an answer in just a minute. I always get anxious when nobody replies kind of quickly as i feel it is being forgotten. So just a heads up i'm working on a answer!
Answer:
option B
polynomial cannot have negative power
hope it helps
Answer:
slope is 1 and y-intercept is (0,-5)
Step-by-step explanation: