Choose a number line to model the following situation:
Mandy spent $75 and then earned $75.
A vertical number line is shown with labels at negative 75, 0, and 75. A blue arrow (labeled earned 75 dollars) begins at 0 and ends at 75. A red arrow (labeled spent 75 dollars) begins at 0 and ends at negative 75.
A vertical number line is shown with labels at negative 150, negative 75, and 0. A red arrow (is labeled spent 75 dollars) begins at 0 and ends at negative 75. A blue arrow (labeled earned 75 dollars) begins at negative 75 and ends at negative 150.
A vertical number line is shown with

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Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
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please help me

- Vocaloid

"spent 75" means he loses 75, so the first arrow will point left to 75
"earned 75" means he gains 75, so the second arrow will point to the right 75 units
-75 + 75 = 0 so the second arrow should end at 0

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