Can someone help me with my classes I have algebra 2 semester 2. It asks questions about conjugates

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

Cora bought a package of erasers. there are 4 pink erasers and 12 blue erasers. what is the ratio of pink erasers to blue erasers?