Audrey’s mom gave her $20 to buy school supplies. Audrey needs to buy four packs of index cards and some notebooks. If each pack of index cards $1.95 and each notebook cost $1.99 how many nova can Audrey buy using all the money. Her mom gave her.

Let's first calculate the total cost of index cards and notebooks Audrey wants to buy:

Cost of 1 pack of index cards = $1.95
Cost of 4 packs of index cards = 4 x $1.95 = $7.80

Cost of 1 notebook = $1.99

Total cost of index cards and notebooks = $7.80 + $1.99 = $9.79

Now, let's subtract the total cost from the $20 Audrey's mom gave her:

$20 - $9.79 = $10.21

Audrey can buy 5 notebooks with the remaining money.

In total, Audrey can buy 4 packs of index cards and 5 notebooks with the $20 her mom gave her.