Si Jose recarga su teléfono con ₡6000 y realiza 5 llamadas de 4 minutos, 3 llamadas de 6 minutos y manda 20 mensajes ¿cuanta recarga le queda si cada minuto de llamada cuesta ₡60 y cada mensaje ₡25?

3220

Step-by-step explanation:

5x4=20

3x6=18

20+18=38

1=60

38x60=2280

20x25=500

2280+500=2780

6000-2780=3220

Ok so this is a bit of a different grid than what a normal one looks like.
I have appointed the coordinates to their respective places on the line.
Where the pink dot is,  would be where your XY line goes (0, -4) the blue is where your YZ line would go (4, -1) and the green is where your ZX would go (6, -3). 
Remember the four quadrants!
Quadrant 1 - The top right quadrant - Both points positive 
Quadrant 2 - The top left quadrant - X-coordinate is negative while the Y- coordinate is positive
Quadrant 3 - The bottom left quadrant - both points are negative
Quadrant 4 - The bottom right quadrant - The opposite of Quadrant 2 which is; X-coordinate is positive while the Y-coordinate is negative.