Which expression could be used to model the total cost for producing ballon banquets

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

Corresponding angles are a. always b. sometimes c. never congruent

Luigi is the first person to finish a 5k race and is standing 13 feet beyond the finish line. another runner, mario, is still running the race and has approximately 24 feet before he reaches the finish line. what is the distance between mario and luigi? explain through words, numbers or pictures how you found the answer.