Two planes leave an airport at noon. if the eastbound plane flies at 660 mph and the westbound plane flies at 600 mph, at what time will they be 2,000 miles apart? round your answer to the nearest minute.

When 142 is added to a number the result is 64 more then 3 times the number. option 35 37 39 41

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Combine like terms to make a simpler expression 3z+z