Southern Phone Company is promoting a new cell phone service plan: a customer can make up to 500 minutes of calls each month for $39.99. If the number of minutes used in a month exceeds 500, then the function c = 0.40(m − 500) + 39.99

describes the monthly charge, c, in dollars in terms of m, the total number of minutes used. Which of the following statements best describes this function?

the answer is true.

step-by-step explanation:

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.

i think it will be zero as slope has a formula of difference between initial and final distance divided by itz time interval

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