Final answer:
Each pendant costs $9.60.
Step-by-step explanation:
To find the cost of each pendant, we need to subtract the cost of the beads from the total cost of the necklaces. The total cost of the beads for all 6 necklaces is $3.10 * 6 = $18.60. Subtracting this from the total cost of $28.20 gives us the cost of the pendants: $28.20 - $18.60 = $9.60. Therefore, each pendant costs $9.60.
The total cost of the beads for all 6 necklaces was $3.10 each, amounting to $18.60 ($3.10 x 6). Since the total cost of the beads and pendants for all 6 necklaces was $28.20, we can find out the total cost of all the pendants by subtracting the total cost of beads from the total cost. So, $28.20 - $18.60 = $9.60 for all pendants. To find the cost of each pendant, we divide the total cost of all pendants by the number of necklaces: $9.60 / 6 = $1.60. Therefore, each pendant cost $1.60.