In Chapter 7 (Graphs of Motion), always ensure your units (km/h vs m/s) match before calculating.
Series like Sasbadi or Pelangi provide "Full Solution" booklets specifically for the textbook exercises.
The "Mathematics Form 4 Textbook Answer" is not a learning tool. It is a mirror . If you look at it and understand why the answer is correct, you are ready for the SPM. If you look at it and feel lost, the answer key just exposed your weak point. Don't hate the answer. Find the solution manual.
Note: The specific curriculum content may vary depending on the country or syllabus (e.g., KSSM in Malaysia, Cambridge O-Level, etc.). The answers above follow standard Form 4 (Grade 10) mathematics topics.
Check your final answer. If it's wrong, don't just erase it. Look at the steps provided in a solution guide to see where the logic broke down.