Pencils cost 25p each. mr smith spends £15 on pencils. work out the number of pencils he gets.

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?

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

Match each inequality to the number line that represents its solution