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MrGrumpy

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AGAIN! Is this a cron job?
Jeez! How many times?
why not try posting a question that means something? That can't be how the problem reads.
Label starting point (0,0) after walking due west, you are at (-52,0) From there, your next displacement is (40 cos 150.4° , 40 sin 150.4°) = (-34.78,7.22), and you are now at (-86.78,7.22) From there, you now displace (0,25) and end up at (-86.78,32.22)
Don't know the algorithm. Inverse exists if determinant is nonzero D = 0 in this case, so no inverse exists
right you are - my bad.
Can you not just copy the problem from the book, so we get the correct wording? It's enough work to solve the problem for the answer, without having to figure out the question as well!

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