Answer:
She lost $15 on her 50 dollar credit card.
Step-by-step explanation:
Kendra received a gift card in the mail from her grandparents. The gift card was worth $50.
Kendra forgot all about the gift card, and the card loses $5 every month after its date of purchase if it has not been used.
Kendra loses $5 each month,
She forget the card for 3 months.
So, Multiply the $5 by 3 months
$5×3=$15
Hence, she lost $15.