You and a partner tend 3 machines that run continuously. one prints 200 plastic bottles per hour, one prints 180 plastic bottles per hour, and one prints 150 plastic bottles per hour. if the machines work at their average rates, how many plastic bottles will they print during the 8.5 hours you are at the factory for your shift?

The first machine does 200 in 1 hour, so in 8.5 hours it will then do 200 * 8.5.

the second machine does 180 in 1 hour, so in 8.5 hours it will then do 180 * 8.5.

the third machine does 150 in 1 hour, so in 8.5 hours it will do then 150 * 8.5.

how many bottles will they all do in total on that time?

(200 * 8.5) + (180 * 8.5) + (150 * 8.5)

50 % is the answer !