Liam is setting up folding chairs for a meeting. If he arranges the chairs in 4 rows of the same length, he has 9 chairs left over. If he arranges the chairs in 2 rows of that same length, he has 13 left over. How many chairs does Liam have?

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Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?

Randy and trey take turns cleaning offices on the weekends. it takes randy at most 4 hours to clean the offices. it takes trey at most 6 hours to clean the offices. what is the greatest amount of time it would take them to clean the offices together? 2.4 hours 2.5 hours