Practice Test Answers

Which property is shown in the matrix addition? the 3 by 2 matrix, row 1, column 1, 0 column 2, negative 5 point 5 row 2, column 1, 6 column 2, 19 point 4 row 3, column 1, 0 column 2, 0 plus the 3 by 2 matrix, row 1, column 1, 0 column 2, 5 point 5 row 2, column 1, negative 6 column 2, negative 19 point 4 row 3, column 1, 0 column 2, 0 is equal to the 3 by 2 matrix row 1, 0 0 row 2, 0 0 row 3, 0 0

Which determinants can be used to solve for x and y in the given system of linear equations? 4 x plus 16 y is equal to negative 68 12 x plus 3 y is equal to 21

A total of 165 people attended the opening night of a school play. Adults were charged 6 dollars , and children were charged 2 dollars The total amount of money collected was 618 dollars Which augmented matrix represents the situation?

The linear system represents the sales of large and small popcorn servings at a movie theater for two consecutive days. 42 liters plus 61 cap s is equal to 393 dollars 59 liters plus 78 cap s is equal to 529 dollars What is the size of the augmented matrix for this system?

A coach purchases 47 hats for his players and their families at a total cost of 302 dollars The cost of a small hat is 5 point 5 0 dollars A medium hat costs 6 point 0 0 dollars A large hat costs 7 point 0 0 dollars He purchases three times as many medium hats as small hats. Using matrices, how many large hats did the coach purchase?

Which would be the next step in solving for matrix cap A ? cap A plus the 1 by 4 matrix, row 1, column 1, 3 column 2, negative 4 column 3, negative 11 column 4, 24 is equal to the 1 by 4 matrix, row 1, column 1, 16 column 2, negative 5 column 3, 0 column 4, negative 9

If cap k is equal to the 3 by 3 matrix, row 1, column 1, negative 2 column 2, 9 column 3, negative 8 row 2, column 1, 7 column 2, 11 column 3, 6 row 3, column 1, 4 column 2, 4 column 3, negative 3 , then what is negative cap k ?

What is the product? the 2 by 2 matrix, row 1, column 1, 5 column 2, negative 2 row 2, column 1, negative 6 column 2, 2 times the 2 by 1 column matrix row 1 negative 1 row 2 negative 1

Which equation can be used to solve for the y -value of the solution in the given system of linear equations? negative 6 x plus 4 y is equal to negative 62 negative 3 x minus 5 y is equal to negative 17

Which matrix will always give a determinant of 0 ?

What is the determinant of cap h is equal to the 3 by 3 matrix, row 1, column 1, 0 column 2, 2 column 3, 3 row 2, column 1, negative 1 column 2, 3 column 3, 5 row 3, column 1, 6 column 2, 3 column 3, negative 2 ?

A row operation is performed on a matrix as shown. Open image in full-screen view What is the value of x ?

Ines created a coefficient matrix to represent the system of linear equations. 3 x is equal to 3 4 y is equal to 8 negative 9 z is equal to negative 27 Which type of matrix did Ines create?

A basketball player scored 33 points during a game by shooting 1 -point free throws, 2 -point field goals, and 3 -point field goals. The player scored 17 times. She scored 3 more 2 -point field goals than 1 -point free throws. The system of equations represents the situation, where x is the number of 1 -point free throws, y is the number of 2 -point field goals, and z is the number of 3 -point field goals. x plus y plus z is equal to 17 x plus 2 y plus 3 z is equal to 33 y minus x is equal to 3 Which matrix and solution represents the number of 1 -point free throws, 2 -point field goals, and 3 -point field goals the player scored?