TEACHER-GUIDE-VERIFIED · TG-V9-005

2. A rover travels 18 km each hour. Write an expression for its distance after h hours and find the distance after 7 hours.

Verified solution

Solution: d = 18h. At h = 7, d = 18(7) = 126 km.

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-V9-005

Write and Evaluate a Rover Distance Expression

A rover travels 18 kilometers each hour. Define h as time in hours and d as distance in kilometers, write d = 18h, then substitute h = 7 to find 126 km. Check with 20 x 7 = 140 km and subtract 14 km to confirm the result.

Space Math Explorers · approved worked example · 2:23 · 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.