For the high school’s production of "grease," 490 tickets were sold. The cost of a student ticket was $8, a pre-sale non-student ticket was $10, and a ticket at the door cost $12. The total income from ticket sales was $4600. The combined number of student and pre-sale tickets was 6 times more than the tickets sold at the door. Which system of equations could be used to determine the number of each type of ticket sold?

The graph shows the populations of two species in a particular region over two decades. based on the graph, what can you conclude about the relationship between the two species? a. the two species have a parasitic relationship. b. the two species are mutualistic in nature. c. the two species exhibit commensalism. d. the two species have a prey-predator relationship. e. the two species have a familial relationship.

Rick is on a bicycle trip. every 4 days he bikes 230 km. if rick keeps this same pace for 16 days, how many kilometers will he bike?

Which of the following sentences uses an incorrect verb? a. there is only one good candidate. b. many good candidates are possible. c. a good candidate is hard to find. d. there is many possible candidates.