Digital ACT Math Practice Question #1994
Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.
det = ad - bc = 0. Solve directly: k = 5.
The determinant of a 2x2 matrix [[a, b], [c, d]] is ad - bc. Setting the determinant equal to 0 yields k = 5....
Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...
Unlock Full Solution & 2,600+ Official Drills
Access detailed Socratic steps, trap breakdowns, authentic timed module simulations, and Desmos speed hacks for just $9.99/mo.
Which of the following complex numbers is equivalent to the expression (3 + 4i) / (1 - 2i)?...
For what value of k does the matrix [[3, k], [4, 12]] have a determinant equal to 0?...
For what value of k will the quadratic equation 3x^2 - 12x + k = 0 have exactly one real solution?...
Matrix \( A \) is defined as \( \begin{pmatrix} 2k & 4 \\ 3 & k-1 \end{pmatrix} \). For which of the following values of...