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If $\vec{a}=(2,1,-1)$ and $\vec{b}=(-1,2,1)$, then $2 \vec{a}-3 \vec{b}$ is equal to
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If $\vec{a}=(2,1,-1)$ and $\vec{b}=(-1,2,1)$, then $2 \vec{a}-3 \vec{b}$ is equal toIf $\vec{a}=(2,1,-1)$ and $\vec{b}=(-1,2,1)$, then $2 \vec{a}-3 \vec{b}$ is equal to   A) $(1,-4,-5)$ B) $(7,-4,5)$ C) $(7,-4,-5)$ D) $(7,4, ...
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asked in Mathematics Jan 13
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Find the inverse of the matrix $$ A=\left(\begin{array}{rrr} 2 & 0 & 4 \\ 1 & 2 & 7 \\ 6 & 4 & 22 \end{array}\right) $$
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Calculate the determinant $$ \left|\begin{array}{rrrr} -2 & 1 & -1 & 1 \\ 3 & 2 & 0 & -4 \\ -1 & 1 & 2 & -1 \\ 1 & -1 & 3 & -2 \end{array}\right| $$

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Write the equation of the plane through the points $ (3,-2,5),(1,4,-1),(2,-6,7) $
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Odd One Out: Which of the following expressions does not represent the same sequence as the others?
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Odd One Out: Which of the following expressions does not represent the same sequence as the others? Odd One Out: Which of the following expressions does not represent the same sequence as the others? A) $\left\{\frac{2(2 i-1)}{2^{2}}\right\}_{i= ...
by MathsGee Platinum
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asked in Mathematics Jan 13
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Solve the equation \( 8^{2 x-5}=2^{x+1} \)
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Solve the equation \( 8^{2 x-5}=2^{x+1} \)Solve the equation \( 8^{2 x-5}=2^{x+1} \) ...
by MathsGee Platinum
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asked in Mathematics Nov 9, 2021
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A large online store offers various brands of milk frothers for making...

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Which of the following statements about principal component analysis (PCA) based on a p×p correlation matrix are true?
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How is information organized in a matrix?
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How is information organized in a matrix?How is information organized in a matrix? ...
by Siyavula Bronze Status
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asked in Mathematics Sep 6, 2021
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How do you use row operations to determine the reduced row echelon form of a matrix?
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How do you use row operations to determine the reduced row echelon form of a matrix?How do you use row operations to determine the reduced row echelon form of a matrix? ...
by Siyavula Bronze Status
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asked in Mathematics Sep 5, 2021
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For each of the augmented matrices below, write the corresponding system of equations.
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For each of the augmented matrices below, write the corresponding system of equations.For each of the augmented matrices below, write the corresponding system of equations. a. \(\left\begin{array}{cc|c}2 & -1 & 5 \\ 3 & 1 ...
by Siyavula Bronze Status
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asked in Mathematics Sep 5, 2021
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Write an augmented matrix for each of the system of equations below.
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Write an augmented matrix for each of the system of equations below.Write an augmented matrix for each of the system of equations below. a. \ \begin{gathered} 2 x+3 y=9 \\ x-y=-1 \end{gathered} \ b. \(\begin{aligned ...
by Siyavula Bronze Status
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asked in Mathematics Sep 5, 2021
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How do you form an augmented matrix from a system of linear equations?
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How do you form an augmented matrix from a system of linear equations?How do you form an augmented matrix from a system of linear equations? ...
by Siyavula Bronze Status
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asked in Mathematics Sep 5, 2021
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Suppose you are given the matrix
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Suppose you are given the matrixSuppose you are given the matrix \(B=\left\begin{array}{ccc}-1 & 3 & -2 \\ 2 & 1 & -3 \\ 0 & 4 & 5\end{array}\right\) a. F ...
by Siyavula Bronze Status
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asked in Mathematics Sep 5, 2021
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What is a matrix?
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What is a matrix?What is a matrix? ...
by Siyavula Bronze Status
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asked in Mathematics Sep 5, 2021
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How do I calculate the cross-product of a 2x2 matrix?
1 answer 304 views
How do I calculate the cross-product of a 2x2 matrix?How do I calculate the cross-product of a 2x2 matrix? ...
by Maths Genie Bronze Status
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asked in Mathematics Aug 9, 2021
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State the difference between a row vector and a column vector.
1 answer 69 views
State the difference between a row vector and a column vector.State the difference between a row vector and a column vector. ...
by Maths Genie Bronze Status
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asked in Mathematics Aug 9, 2021
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What is Electronegativity ?
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What is Electronegativity ?What is Electronegativity ? ...
by MathsGee Platinum
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asked in Chemistry Jul 29, 2021
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What is IUPAC naming?
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What is IUPAC naming?What is IUPAC naming? ...
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asked in Geography Jul 29, 2021
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How can I prove that a matrix $S_{ij}$ is positive semi-definite?
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Construct the $3 \times 2$ matrix whose elements are given by $a_{i j}=\frac{i}{j}$
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Construct the $3 \times 2$ matrix whose elements are given by $a_{i j}=\frac{i}{j}$Construct the $3 \times 2$ matrix whose elements are given by $a_{i j}=\frac{i}{j}$ ...
by MathsGee Platinum
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asked in Mathematics Jul 24, 2021
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If a matrix 18 elements what is the possible order it can have?
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If a matrix 8 elements what is the possible order it can have ?
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Write the elements of $a_{13}, a_{21}, a_{33}, a_{24}, a_{23}$
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Write the elements of $a_{13}, a_{21}, a_{33}, a_{24}, a_{23}$ In a matrix \begin{equation} \left\begin{array}{cccc} 2 & 5 & 19 & -17 \\ 35 & -2 & \frac{5}{2} & 12 \\ \sqrt{3} &am ...
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asked in Mathematics Jul 24, 2021
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Define what a symmetric matrix is
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Define what a symmetric matrix isDefine what a symmetric matrix is ...
by MathsGee Platinum
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asked in Mathematics Jul 24, 2021
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