You have a cell phone plan that allows for unlimited calling and 1000 text messages for $21.25. Every text message for 1000 text messages will cost $0.10 per text. Your parents will only pay up to $60 for you phone bill. A) Write an inequality to model this situation. Be sure to define your variables.
60-0.10y > 21.25

B) How many text messages could you send each month?
[Insert your answer here]

A) 21.25 + 0.1m <= 60

B) 387

Step-by-step explanation:

I think the problem means to say that the first 1000 text messages are included in the $21.25 plan, and messages above the included 1000 cost $0.10 each.

A)

Let m = number of text messages above 1000.

0.1m is the cost of the messages past the included 1000.

The cost of the plan ($21.25) plus the cost of the messages above 1000, must cost up to $60.

21.25 + 0.1m <= 60

B)

21.25 + 0.1m <= 60

0.1m <= 38.75

m <= 38.75/0.1

m <= 387.5

387

f(x) is going down by 4

step-by-step explanation:

(its either that or its going left by 4)

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.