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mary ann and carlos are each saving for new scooters. Their savings are shown. Let x represent the number of hours each person works y represent the total earnings in dollars
A: What is the difference in their savings after working 3 hours
1. Mary Ann has saved $2 more than Carlos
2. Carlos has saved $8 more than Mary Ann
3. Carlos has saved $2 more than Mary Ann
4. Mary Ann has saved $6 more than Carlos
