Answer:
The value of a=4
Step-by-step explanation:
Given the matrix
so solving the matrix B by taking its determinant to get the value a
as according to determinant formula
Therefore, the value of a=4
<u>Answer:</u>
The hand moved of a complete turn.
<u>Step-by-step explanation:</u>
The hand moved from 3 to 12, that is, it moved:
12 - 3 = 9 hours
In a clock, 12 hours represent a complete turn.
∴ Using the unitary method:
12 hours ⇒ 1 turn
1 hour ⇒ turns
9 hours ⇒ × 9 =
= turns (simplified)
∴ The hand moved of a complete turn.