John bought a bicycle for $20 sold it for $30 rebought it for $40 and resold it for $50. how much money did he make or loose?

Which expression is equivalent to 2x^2+2x-4/2x^2-4x+2

At a kentucky friend chicken, a survey showed 2/3 of all people preferred skinless chicken over the regular chicken. if 2,400 people responded to the survey, how many people preferred regular chicken?

Meghan has created a diagram of her city with her house, school, store, and gym identified. a. how far is it from the gym to the store? b. meghan also wants to walk to get some exercise, rather than going to the gym. she decides to walk along arc ab. how far will she walk? round to 3 decimal places.