The mathematical model C=500x+70000 represents the cost in dollars a company has in manufacturing x items during a month. How many items were produced if costs reached 320000?

500 items

Step-by-step explanation:

plug the $320000 into C

320000=500x+70000

1. substract 70000 from both sides (always get rid of adding/substracting first)

320000=500x+70000

-70000 - 70000

250000=500x

2. divide both sides by 500 (you divide both sides by whatever number is in front of x so you can isolate it)

250000/500=500x/500

500=x

there you go : D good luck and have a good day