Solve for x and y a2 -b2 =0 and a2b/x +b2a/y = a+b

For how answer my question this will be the last question can you answer in math subject

The graph shows the distance kerri drives on a trip. what is kerri's speed . a. 25 b.75 c.60 d.50

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.