What is the value of n to the nearest whole number? 10 13 18 21

Write the pair of fractions as a pair of fractions with a common denominator

Find the distance between the point (-3,-4), and (see the picture below)

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