Final answer:
Kelsey must make 10 additional pendants to make a profit of $50.
Step-by-step explanation:
To determine how many additional pendants Kelsey must make and sell to make a profit of $50, we need to know the cost per pendant and the selling price. Let's assume that the cost of making one pendant is $10 and Kelsey sells each pendant for $15.
To calculate the profit per pendant, we subtract the cost from the selling price: $15 - $10 = $5.
Since Kelsey wants to make a profit of $50, we divide the desired profit by the profit per pendant: $50 ÷ $5 = 10.
Therefore, Kelsey must make and sell 10 additional pendants to make a profit of $50.