🚀 Space Math Explorers

TEACHER-GUIDE-VERIFIED · TG-V9-020

1. A probe starts with 1,200 energy units, uses 85 per day, and must keep 350. Solve 1200 - 85d = 350.

Verified solution

Solution: -85d = -850, so d = 10 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-V9-020

Solve a Probe Energy Equation | 1,200 − 85d = 350 (TG-V9-020)

Solve 1,200 − 85d = 350 to find a probe operating time of 10 days. Separate usable energy from the reserve, solve using algebra, check the original equation, and explain why day 11 would fall below the required reserve.

Space Math Explorers · approved worked example · 2:55 · 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.