Introduction to Matrices — Quiz Answers

Which is a square matrix?

Mateus created a matrix using the elements. A sub 11 is equal to 32 A sub 12 is equal to 10 A sub 13 is equal to negative 9 A sub 21 is equal to 5 A sub 22 is equal to 7 point 5 A sub 23 is equal to 4 A sub 31 is equal to negative 0 point 5 A sub 32 is equal to 6 A sub 33 is equal to 16 What type of matrix did Mateus create?

Which matrix is equal to the 2 by 3 matrix, row 1, column 1, negative 6 column 2, negative 6 point 5 column 3, 1 point 7 row 2, column 1, 2 column 2, negative 8 point 5 column 3, 19 point 3 ?

How many nonzero elements are in the matrix? the 5 by 6 matrix, row 1, column 1, 2 column 2, 0 column 3, 0 column 4, 3 point 1 column 5, 22 column 6, 9 row 2, column 1, 0 column 2, 21 column 3, 3 point 2 column 4, 0 column 5, 0 column 6, 6 row 3, column 1, 1 column 2, 42 column 3, 0 column 4, 0 column 5, 0 column 6, 8 row 4, column 1, 40 column 2, 0 column 3, 0 column 4, 4 column 5, 6 column 6, 14 row 5, column 1, 10 column 2, 20 column 3, 0 column 4, 13 column 5, 5 column 6, 6 point 3

Which of the following is a diagonal matrix?

Which matrix is equal to the 2 by 2 matrix, row 1, column 1, 3 column 2, 2 row 2, column 1, negative 5 column 2, 9 ?

Drina wrote the system of linear equations. 3 x minus 2 y is equal to negative 2 7 x plus 3 y is equal to 26 negative x minus 11 y is equal to negative 46 Which type of matrix can be formed using this system of equations?

Which is an augmented matrix for the system of linear equations? negative 4 x plus 3 y is equal to 216 10 x minus 4 y is equal to negative 156

Matrices cap A and cap b shown are equal. cap A is equal to the 2 by 2 matrix, row 1, column 1, 7 column 2, negative 18 row 2, column 1, 3 column 2, 24 cap b is equal to the 2 by 2 matrix, row 1, column 1, b sub 11 column 2, b sub 12 row 2, column 1, b sub 21 column 2, b sub 22 What is the value of b sub 12 ?

Dakarai wrote the system of linear equations. 7 x plus 8 y is equal to 28 negative 3 x plus 9 y is equal to negative 24 Dakarai then wrote the coefficient matrix that represents this system. Which matrix could she have written?