you bought 5 chocolate bars and 8 below pops for $23.25. Your sister bought 2 chocolate bars and 13 blow pops for $21.55. How much did wach choclate bar cost? Each choclate bar cost $

Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining bismuth-210 transforms into another atom (polonium-210 in this case) each day. if you begin with 233 mg of bismuth-210, how much remains after 8 days?

Which of these choices show a pair of equivalent expressions?

Combine like terms to make a simpler expression 3z+z