What is the determinant of a 2x2 matrix with elements a, b, c, and d?

Determinants and Matrix Methods

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Mathematics
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9th - 12th Grade
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Hard

Emma Peterson
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
a - b + c - d
a + d - b - c
ad - bc
ab + cd
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the determinant of a 2x2 matrix with elements -8, 1, -3, and 9?
0
19
10
27
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which method involves copying columns to calculate a 3x3 determinant?
Matrix Inversion Method
Row Reduction Method
Diagonal Method
Cofactor Method
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the diagonal method, what do you do after copying the first two columns?
Add them to the end of the matrix
Subtract them from the matrix
Ignore them
Multiply them by the determinant
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the diagonal method, what is the result of the red diagonals?
The product of the sums
The quotient of the products
The sum of the products
The difference of the products
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the determinant of a 3x3 matrix using the diagonal method if the red diagonals sum to 14 and the green diagonals sum to -4?
4
10
18
14
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in the method of cofactors?
Copy the first row
Add all elements together
Multiply all elements by 2
Select any row or column
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