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TEACHER-GUIDE-VERIFIED · TG-V9-077

2. Plan A costs 50t+800 and Plan B costs 30t+1200. Find the break-even time and cost.

Verified solution

Solution: 50t+800=30t+1200; 20t=400; t=20. Cost=1,800 units.

Source: Teacher Guide V9 · English V9. Match the numbers and wording in your printed question before using this solution.

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VIDEO HELP · TG-V9-077

Find When Two Mission Plans Break Even (TG-V9-077)

Set 50t + 800 = 30t + 1,200, solve 20t = 400 to get t = 20, and check both plans cost 1,800 units. The question does not specify a physical time unit.

Space Math Explorers · approved worked example · 1:08 · Watch on YouTube

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These pages reproduce verified solution steps for the registered V9 questions. It does not diagnose learning needs or replace instruction from a qualified teacher or tutor.