Suppose that Andrea told you that​ "Blake and I started out with the same number of​ marbles, but I gave him one of mine. Now Blake has one more marble than​ me." Why is​ Andrea's reasoning​ incorrect? How can you address her​ misunderstanding? Choose the answer below that best explains the misunderstanding.

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Suppose that Andrea told you that​ "Blake and I started out with the same number of​ marbles, but I gave him one of mine. Now Blake has one more marble than​ me." Why is​ Andrea's reasoning​ incorrect? How can you address her​ misunderstanding?
Choose the answer below that best explains the misunderstanding.
 
 
A.
Andrea meant to say that she took one of her marbles away and not give it to Blake.​ Therefore, Blake would only have one more than her.
 
B.
Blake needs to take one of his marbles away first.​ Then, Andrea can give him one of hers.​ Thus, Blake will have one more than Andrea.
 
C.
Andrea meant to say that after giving Blake one of her​ marbles, she would have one less than Blake.
 
D.
Andrea has one less than she started with. Blake has one more than he started with.​ Therefore, Blake has two more than Andrea.
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