2x+3y=9 x+5y=8

Solve using elimination

Brainliest for correct answer

This is for systems of equations

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?

Anyone know? will mark brainliest if you're correct!

Find cot x if sin x cot x csc x = √2