Invitations cost $3 for a pack of 8.Lori gives the cashier $20 to buy invitations and gets $11 in change.how many packs of invitations does Lori buy? Explain.
Lori buys 3 invitations as 20-11 is 9 and 9 divided by 3 is 3 which therefore means she bought 3 invitations for 9 dollars excluding sales tax of course
