Compared to last year the population of city had decreased by 15% the population is now 6800 what was the population last year?

What are “like terms”? why can we only add like terms?

1. the wheeling bridge in west virginia is about 307 meters long. if you walk with a stride of about meter, about how many steps would it take you to cross this suspension bridge?

The triangles in the diagram are congruent. if mzf = 40°, mza = 80°, and mzg = 60°, what is mzb?