F(x) = x^2 − 18x + 63
express the quadratic function in standard form?

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?

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?