Fern's estimate is not correct because he rounded 548 wrong, it would be rounded to 550 instead since the number 8 is closer to 10. So the correct answer would be 420.
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the question is not correct
edit it and I will answer u in comments
Answer:
Step-by-step explanation:
I’m not too good with this but the answer should be 87.5
Y=2x+1 I think this is correct but I don’t know how to do equations very well