Answer:
Troy should have 28 pounds left in the cylinder.
Step-by-step explanation:
So here's what we're given:
Amount of gas in cylinder = 50 pounds
Amount of gas used in Ms. Jones system = 13 pounds
Amount of gas used in client system = 9 pounds
Here's what we need to find:
Amount of gas still in cylinder
Now here's what we need to compute:
Amount of gas still in cylinder = Amount of gas in cylinder - Amount of gas used in Ms. Jones system - Amount of gas used in client system
Amount of gas still in cylinder = 50 - 13 - 9
Amount of gas still in cylinder = 28 pounds
Hope I helped! ☺