Digital ACT Math Practice Question #1999
Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.
Row-by-column: 2(4) + 5(1) = 13. Matches only choice [[13], [-1]].
Matrix multiplication row by column: Row 1 = (2)(4) + (5)(1) = 13. Row 2 = (-1)(4) + (3)(1) = -1. Result is [[13], [-1]]....
Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...
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