Larry can deliver 50 newspapers in 20 minutes. Mary can deliver 60 newspapers in 30 minutes. How long would it take them to deliver 270 newspapers if they were together?

"you know, playing tennis is healthier than watching a tennis match on television," katya remarked to her couch potato brother. in this sentence, healthier is a/an a. superlative. b. comparative. c. positive form. d. adverb.

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15