1,332 prompts matching "Explain standard deviation back to me"
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WAEC Prep: Multiplying every entry of a matrix by a scalar
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Learn: The distributive law for a scalar over a sum of matrices
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Quiz: Multiplying a matrix by minus one
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WAEC Prep: The difference between pre-multiplying and post-multiplying by a matrix
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Spot My Mistake: Orders that make a product possible one way round but not the other
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Quiz: Solving AX equals B and XA equals B by different routes
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Practice: The transpose of a 2 by 3 matrix
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WAEC Prep: The identity matrix, and what it does in a product
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Practice: A diagonal matrix
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WAEC Prep: Reading the order of a matrix as rows by columns
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Learn: Deciding whether a stated matrix calculation is possible at all
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WAEC Prep: Evaluating 2A plus 3B for two given matrices
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Practice: Evaluating AB minus BA
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Quiz: Finding an unknown entry from a stated matrix equation
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WAEC Prep: The determinant of a 2 by 2 matrix as ad minus bc
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Learn: The effect on a determinant of swapping two rows
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WAEC Prep: Expanding a 3 by 3 determinant along the first row
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Quiz: Expanding a 3 by 3 determinant along a row or column containing noughts
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WAEC Prep: Setting out the coefficient determinant for two simultaneous equations
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Spot My Mistake: Forming the determinant Dx by replacing the first column
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