I’m so confused! i tried to watch a video on it but i don’t understand and we need to do work :(

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made

Find the nonpermissible replacement for binthis expression.b2/5b +5

3c2 + 2d)(–5c2 + d) select all of the partial products for the multiplication problem above.