Which graph shows a system of equations with one solution?

coordinate plane with two parallel lines
coordinate plane with two intersecting lines
coordinate plane with two coinciding lines
coordinate plane with two parallel lines

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

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Hii1977 cleaner shrimp are a species of shrimp that clean parasites from other organisms. fish allow the shrimp to eat the parasites in their mouth. the shrimp get a source of nutrition. the relationship between the shrimp and the fish is this association indicates that for the smaill aneser arecommensal,mutualistic,or parasitic for the begger one the anser are the shrimp and fish benefit each other , the shrimp harm the fish, or the fish do not benetit from the shrimp