53b−7b−6b+1 if b=25 Please help me with this problem! And what is the simplified expression?

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?

Assemble the proof by dragging tiles to the statements and reasons column

How do i put 3(x+7) in distributive property