PLEASE HELP PLEASE PLEASE PLEASE Alvin's age is three times Elga's age. The sum of their ages is 112. What is Elga's age?

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

Sarah took the advertising department from her company on a round trip to meet with a potential client. including sarah a total of 11 people took the trip. she was able to purchase coach tickets for $280 and first class tickets for $1280. she used her total budget for airfare for the trip, which was $6080. how many first class tickets did she buy? how many coach tickets did she buy?

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10