1+1+1+1+1+11+1+1+1+1+1+1+1+1+1+1+1+ 1+1=

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

The map shows the location of the airport and a warehouse in a city. though not displayed on the map, there is also a factory 112 miles due north of the warehouse.a truck traveled from the warehouse to the airport and then to the factory. what is the total number of miles the truck traveled?