Question

When Melissa does inventory at work with her coworker, it takes her 30 minutes less than when she does inventory by herself. Select the expression that represents how much time Melissa has spent doing inventory if she does it twice by herself and twice with her coworker.

Answer 1

2x + 2(x - 30)

Explanation:

This question is missing the answer choices

Let x be the minutes Melissa does inventory at work by herself

If she does the inventory twice by herself then it would be 2x minutes

If she does it with a coworker it takes 30 minutes less so
it would be x - 30 minutes

Twice this is 2(x - 30)

Therefore:

If she does it twice by herself and twice with her coworker it would be
2x + 2(x - 30)

Answer 2

Melissa has spent doing the inventory alone 1 hour per day and 30 hours with her partner per day so we let that when she does the inventory alone in two days it takes 2 hours and when she does it with her partner it takes 1 hour of 2 days