Using a Laplace expansion along the first column, we have

The determinant of a 2x2 matrix is trivial,

So we have

Answer:
14 cards
Step-by-step explanation:
70 - 15 = 55
55/4 = 13.75
Therefore, the highest number of cards someone is able to get is 14.
Answer:because it shows how the shape on the right is the same as the one on the left, just after being enlarged
Step-by-step explanation: