La compañía de teléfonos celulares a cobra $ 20 por mes más $ 0.05 por mensaje de texto. la compañía de teléfonos celulares b cobra $ 10 por mes más $ 0.07 por mensaje de texto. ¿hay algún número de mensajes de texto que resulten en el mismo cargo exacto de ambas compañías?

Y es. 500

Explicación:

Si x es el número de mensajes de texto por mes, la compañía A cobra 20 + 0.05⋅x y la compañía B cobra 10 + 0.07⋅x

Si la carga es la misma, entonces

20 + 0.05⋅x = 10 + 0.07⋅x

20−10 = 0.07⋅x - 0.05⋅x

10 = 0.02⋅x

x = 100.02 = 102100 = 10⋅1002 = 500

a) 0.25x times 3. (could be wrong on equation.)

b) 2.25 pound of dark chocolate. (can i eat all the chocolate? plz? anyway, again, could be wrong, but i hope im right. all the chocolate together should be 5.25 pounds)

have a good day!

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