Alexandra earns 125$ from her paper route each month, but she spends about $20 each month on her personal expenses. to pay for a school field trip that costs $800, about how many months does she need to save money? explain.

First, lets subrtact $20 from $125 since that what she'll have left each month after her personal expenses.

125 - 20 = 105

So, she makes $105 each month.
Divide that by $800 to get your answer.

800/105 = 7.61904762

So, it takes her a little over seven-and-a-half months.