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WGU C278 Algebra II QUESTIONS AND ANSWERS ALL CORRECT
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WGU C278 Algebra II QUESTIONS AND ANSWERS ALL CORRECT
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Algebra IImatrix Correct Answer: A ____ is a rectangular array of numbers.
dimension Correct Answer: The ____ is the number of rows and the number of columns in a matrix.
row Correct Answer: A ____ is all of the numbers in one horizontal line in a matrix.
element Correct Answer: A number in a matrix is called an ____.
dimension Correct Answer: Only matrices of the same ____ can be added or subtracted.
transpose Correct Answer: A related matrix form by making the rows of a matrix into columns and the
columns into rows is called a ____.
columns Correct Answer: Before you can multiply two matrices together, the number of ____ in the
first matrix must equal the number of rows in the second matrix.
zero matrix Correct Answer: The ____ is the m x n matrix all of whose entries is 0.
row Correct Answer: When multiplying matrices, multiply the elements in each ____ of the first matrix
time the corresponding elements in each column of the second matrix.
variables Correct Answer: A coefficient matrix is formed from the coefficients of the ____ of a system of
linear equations.
multiple Correct Answer: Row addition is adding a ____ of one row to another row of a matrix.
operation Correct Answer: Elementary tow ____ is row switching, row multiplication, or row addition.
multiplication Correct Answer: Row ____ is multiplying a row of a matrix by a nonzero constant.
rows Correct Answer: Row switching is interchanging two ____ of a matrix.
augmented Correct Answer: A ____ matrix is formed by adding a column of the constant terms to the
coefficient matrix of a linear system.
quotients Correct Answer: Cramer's Rule is a method of calculating the solution to a system of linear
equations by finding the ____ of the determinants.
zero Correct Answer: Cramer's Rule will not work if the determinant of the coefficient matrix is equal to
____.
inverses Correct Answer: Two square matrices are ____ if their product is the identity matrix.
reciprocal Correct Answer: A determinant will have a ____, and the matrix will have an inverse if the
determinant is not zero.
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