Question

each month, a phone company charges $20 for 500 minutes of talk time plus $0.45 for each additional minute. unlimited texting cost $30 more. write an expression to show the cost of a talk-and-texting plan for one month, given x minutes over 500

Answer 1

Answer:

C = 50 + (0.45x)

Step-by-step explanation:

If 500 minutes of talk = 20

and texting = 30

and each additional minute of talk = 0.45

then the bill would be (for C = total cost)

C = 20+30+(0.45 • x)

OR

C = 50 + 0.45x

Answer 2

Using the cost information given, the cost function of the phone company for a month plab would be : C(x) = 50 + 0.45x

The cost function of the company can be expressed thus :

• Number of minutes over 500 = x

• Total cost, C(x) = 500 minutes talk time + Additional taktine fee + unlimited texting fee

Hence,

C(x) = 20 + 0.45x + 30

C(x) = 50 + 0.45x

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