How do I solve this? Thank you!

Which ratio is equivalent to 10: 85

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

What will the graph look like for a system of equations that has no solution? a. the lines will be perpendicular. b. the lines will cross at one point. c. both equations will form the same line. d. the lines will be parallel.