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ELEGIR COMPAÑÍA DE TELÉFONO




                        
                                Alba Blanco
                        
                            Proyecto de
                            Matemáticas
                            
                                   4ª E.S.O
                    
                            1ª Evaluación
Gastos con las compañías



    GASTO CON TELEFÓN

    28 + 0,08x + 0,02y = 40

    - resultado – y = 600 – 4x

    GASTO CON LEMON

    20 + 0,10x + 0,05y = 40

    - resultado - y = 400 - 2x

COMPARACIÓN DE COMPAÑIAS
               700




               600




               500
Mi nutos a Fra nci a




               400




               300




               200




               100




                       0
                           0   50        100                          150   200   250
                                               Mi nutos a Pol oni a
Costes mayores o menores
Que operador elegiría


    Elegiría el operador de Lemon al ser un gasto
      más económico.
Indica cuántos minutos deben facturarse a
 Polonia y a Francia para que coincidan las
      facturas de los dos operadores.


    200 minutos Francia

    90 minutos Polonia
    
            400 + 150/2 = 275
        
            600 + 200 = 700
En Telefón decide subir su cuota a 32 euros.
Inecuación, gasto menor o igual a 40 euros.

  
      32 + 0,08x + 0,02y = 40
       0,08x + 0,02y = 40-32
         0,08x + 0,02y = 8
          8x + 2y = 800
           2y = 800-8x
         y = 800/2 – 8x/2
            y = 400-4x
                                
Nueva inecuación
               Nueva inecuación de Telefón y de Lemon
350



300



250



200



150



100



50



 0
  100     40                             80             120
Dependiendo del cuadrante anterior la
         factura es superior o inferior

                 ( X, Y )                      Llamando X minutos a Polonia
                                                   e Y minutos a Francia
Por encima de la recta de Lemon             SUPERIOR


Encima de la recta de Telefón y debajo de   SUPERIOR
la de Lemon

Por debajo de las dos rectas                INFERIOR
¿Qué operador elegirías como
     predeterminado para tus llamadas?

●   Elegiría Telefón como operador 
    predeterminado para mis llamadas.

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Cómo elegir la mejor compañía telefónica

  • 1. ELEGIR COMPAÑÍA DE TELÉFONO  Alba Blanco  Proyecto de Matemáticas  4ª E.S.O  1ª Evaluación
  • 2. Gastos con las compañías  GASTO CON TELEFÓN  28 + 0,08x + 0,02y = 40  - resultado – y = 600 – 4x  GASTO CON LEMON  20 + 0,10x + 0,05y = 40  - resultado - y = 400 - 2x 
  • 3. COMPARACIÓN DE COMPAÑIAS 700 600 500 Mi nutos a Fra nci a 400 300 200 100 0 0 50 100 150 200 250 Mi nutos a Pol oni a
  • 5.
  • 6. Que operador elegiría  Elegiría el operador de Lemon al ser un gasto más económico.
  • 7. Indica cuántos minutos deben facturarse a Polonia y a Francia para que coincidan las facturas de los dos operadores.  200 minutos Francia  90 minutos Polonia  400 + 150/2 = 275  600 + 200 = 700
  • 8. En Telefón decide subir su cuota a 32 euros. Inecuación, gasto menor o igual a 40 euros.  32 + 0,08x + 0,02y = 40 0,08x + 0,02y = 40-32 0,08x + 0,02y = 8 8x + 2y = 800 2y = 800-8x y = 800/2 – 8x/2 y = 400-4x 
  • 9. Nueva inecuación Nueva inecuación de Telefón y de Lemon 350 300 250 200 150 100 50 0 100 40 80 120
  • 10. Dependiendo del cuadrante anterior la factura es superior o inferior ( X, Y ) Llamando X minutos a Polonia e Y minutos a Francia Por encima de la recta de Lemon SUPERIOR Encima de la recta de Telefón y debajo de SUPERIOR la de Lemon Por debajo de las dos rectas INFERIOR
  • 11. ¿Qué operador elegirías como predeterminado para tus llamadas? ● Elegiría Telefón como operador  predeterminado para mis llamadas.