Jean sells office supplies. She is paid a graduated commission of 4% on 1st $6,000 sales: 7 1/2% on next $6,000; and 10% on sales over $12,000. Her total
sales for the month are $14,640. How much did she earn in commission?*

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.

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