A1 — Apply mathematical processes and communicate reasoning | Concept Lesson

Ontario Grade 9 Mathematics — Strand A: Mathematical Thinking and Connections

Question

Question: A cell-phone plan charges a flat monthly fee of 18 dollars plus 5 cents per text message sent. A second plan charges 11 cents per text message with no flat fee. How many text messages per month make the two plans cost the same? Justify your answer fully using the four-part framework. A1 — Apply mathematical processes and communicate reasoning | Concept Lesson This lesson introduces the four-part justification framework — State, Set Up, Solve, Verify and Conclude — as a structured approach to applying an…

Step-by-step video solution

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  Ontario Grade 9 Mathematics — Strand A: Mathematical Thinking and Connections
• A2 — Connect mathematics to real life, knowledge systems, and careers | Worked Example
  Ontario Grade 9 Mathematics — Strand A: Mathematical Thinking and Connections