Recent content by blhhblah

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    Undergrad Question regarding multiple steps in linear mapping

    Hi, I'm having some difficulty with this problem. I need to project a point in R2 to the line x2 = x1 (sqrt(3)) and then rotate it 30 degrees clockwise. I believe the 2x2 matrix to map it is just sqrt(3) 0 0 1 and to rotate a vector clockwise as opposed to counter clockwise...
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    Undergrad Having difficulty with an Ax=b problem and understanding it

    matrix A was 2 8 4 16 1 1 2 2 1 -1 2 -2 I was able to reduce it to 1 0 2 0 0 1 0 2 0 0 0 0 but I'm not sure how to match it up to b, which is -1 9 5 17
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    Undergrad Having difficulty with an Ax=b problem and understanding it

    i guess all the values won't be exact, but I'm not sure how to set this up
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    Undergrad Having difficulty with an Ax=b problem and understanding it

    regarding another question... how do you solve for x given A is a (3x4) matrix and b is a (4x1) matrix?
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    Undergrad Having difficulty with an Ax=b problem and understanding it

    is this the reduced row echelon form? 1 0 1 0 1 -2 0 0 0
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    Undergrad Having difficulty with an Ax=b problem and understanding it

    I'm having trouble with Ax=b matrices. I get really confused when dealing with matrices that have a different number of rows from columns. An example is this problem: (A is a 3x2 matrix) A = 3 1 4 2 -5 -1...