TEACHER-GUIDE-VERIFIED · TG-V9-060

1. A crew has 960 L of water, must reserve 240 L, and uses 60 L/day. Solve 960-60d >= 240.

Verified solution

Solution: -60d >= -720. Divide by -60 and reverse the sign: d <= 12 days.

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-V9-060

Solve a Water-Reserve Inequality (TG-V9-060)

Solve 960 - 60d >= 240 by subtracting 960, dividing by -60 and reversing the inequality. The physical range is 0 through 12 days; check 240 liters at day 12 and 180 liters at day 13.

Space Math Explorers · approved worked example · 1:15 · 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.