During sonia's trip across the country that she travel 2884 miles her trip took 7 days find a unit rate to represent the average amount of travel per day during the trip

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out