Algebra: distance from a fixed point

AI Thread Summary
The discussion centers on a mathematical problem involving the distance from a fixed point, where the initial calculation leads to the expression +(2a-b)-(3a+2b), resulting in -a-3b. Participants express confusion over the book's answer of a+b, suggesting it may be a typo. The consensus is that the correct interpretation should yield a distance of 2a+b miles north. Clarification on the book's content is sought, indicating potential errors in the material. Overall, the conversation highlights the importance of verifying mathematical solutions against reliable sources.
drooble122
Messages
6
Reaction score
1
Homework Statement
See image
Relevant Equations
Basic algebra
Capture.JPG

Capture.JPG


The first image is the question and the second is the answer.
My thinking is let's say North is positive, and South is negative. Fixed point O is the starting point. Then the question becomes +(2a-b)-(3a+2b). The answer should be -a-3b. I cannot fathom why the book gives the answer as a+b. Any help would be appreciated. Thank you.
 
Physics news on Phys.org
I'd say you were correct. What book are you using?
 
It's probably a typo and they meant to say 2a+b miles north.
 
Office_Shredder said:
It's probably a typo and they meant to say 2a+b miles north.
Exactly.
 

Similar threads

Reducing one algebraic fraction to another
Replies
3
Views
2K
B: Calculate the distance between two points without using a coordinate system
Replies
20
Views
3K
Find the coordinates of a point C from the given line, point and circle
Replies
8
Views
2K
Prove that terms cyclic in ##a,b,c##, are in ##\text{AP}##
Replies
7
Views
2K
Distance-time graph of a ball throw vertically up from a fixed point
Replies
5
Views
2K
Legacy puzzle - elegant approach?
Replies
6
Views
3K
I What Happens When a Rigid Body with a Fixed Point Moves Along a Closed Path?
Replies
8
Views
2K
Distance between fixed points of contracting maps
Replies
12
Views
2K
Derivative of a Point of Max: Finding a & b Conditions
Replies
7
Views
2K
How to find the equilibrium position of three masses (two of them fixed)?
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top