Afence along a schoolyard is 250 feet long. there is a fence post every 10 ft. how many fence posts are there?

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?

How many lines can be drawn through points j and k? 0 1 2 3

What is the anwers for 9+2x=5x-3-x