Table of contents
- 0. Review of Algebra4h 18m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 6m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 22m
- 10. Combinatorics & Probability1h 45m
7. Systems of Equations & Matrices
Determinants and Cramer's Rule
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Evaluate the determinant of the matrix.

A
3107
B
6227
C
33
D
12

1
Identify the elements of the 2x2 matrix: a = 4, b = \frac{9}{2}, c = \frac{2}{3}, d = 9.
Recall the formula for the determinant of a 2x2 matrix: det(A) = ad - bc.
Substitute the identified elements into the determinant formula: det(A) = (4)(9) - (\frac{9}{2})(\frac{2}{3}).
Calculate the product of the diagonal elements: 4 * 9.
Calculate the product of the off-diagonal elements: \frac{9}{2} * \frac{2}{3}.
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