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Answer:Plan A: 0.10xPlan B: 12 + 0.02xStep-by-step explanation:How many SMS they get each month has a significantimpact.Plan A is the one to use if they only send or receive 50 texts each month. Plan A will cost them $5, while Plan B will cost them $13. Plan B will be used if they receive or send 1000 text messages each month. Plan A will cost them $100, and Plan B will cost them$32.0.10x = 12 + 0.02x-11.90x = 0.02xx = 150The inequality would need to be x 150 for you to choose plan A and x > 150 for you to prefer plan B. In other words, in order to want plan A, you need send or receive fewer than 150 texts, and in order to want plan B, you can send or receive more texts than 150 texts.To learn more aboutinequalityrefer to:brainly.com/question/24372553#SPJ1...