Simphiwe bought meal tickets to use at the school's cafeteria. Each meal Tequires 2 tickets, and she bought 14 tickets in total. She has already used some of the tickets, and she still has some left.
2.1.1 Write four equivalent expressions that gives the number of tickets Simphiwe has left in terms of x, where x is the number of meals she has already bought.
2.1.2 14-2x represents the number of tickets Simphiwe has left after she bought x meals. How can 14, -2, and 2x be interpreted in terms of tickets and meals?
2.1.3 2(7-x) also represents the number of tickets Simphiwe has left after she bought meals. How can 7, (7-x), and 2 be interpreted in terms of tickets and meals?

Respuesta :

The four equivalent expressions that gives the number of tickets Simphiwe has left in terms of x, where x is the number of meals she has already bought are;

  • 14-2x
  • 2(7-x)
  • 14 - x - x
  • 10 + 4 - 2x

Equation

  • number of meals she has already bought = x
  • Total number of tickets = 14
  • Number of tickets per meal = 2

Four equivalent expressions that gives the number of tickets Simphiwe has left in terms of x are;

  • 14-2x
  • 2(7-x)
  • 14 - x - x
  • 10 + 4 - 2x

In the expression 14−2x

  • 14 represents the number of tickets Simphiwe started with since the value of the expression is 14

  • −2 represents the number of tickets she spends per meal.

  • 2x represents the number of tickets she has to subtract from her initial amount after x meals.

In the expression 2(7−x),

  • 7 represents the total number of meals Simphiwe can get

  • (7−x) represents the number of meals she has left

  • 2 represents the number of tickets required for each ride Simphiwe has left.

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