Question

Tavon has a gift card of $90 that loses $2 for each 30-day period not used. He has another gift card for $70 that loses $1.50 for each 30-day period not used. What will the value of each card be when they have equal value?

Answer 1

Answer:

$10

Step-by-step explanation:

Let the number of 30 day periods be x.

$90-2x=70-1.5x \\ \\ 20=0.5x \\ \\ x=40$

When x=40, the value is 90-2(40)=$10.