Question 167761: The equation C=MX+B can be used to modle the monthly cost,C, of a cell phone plan where B is the flat monthly cost, M represent the cost in dollars per minute and X is the number of minutes used in the month. Choose a flat monthly rate and cost per minute and insert the values you have chosen for M and B into the equation. Then use this equation to find the total monthly cost C if 68 minutes are used.
Answer by midwood_trail(310)   (Show Source):
You can put this solution on YOUR website! The equation C = MX+B can be used to modle the monthly cost,C, of a cell phone plan where B is the flat monthly cost, M represent the cost in dollars per minute and X is the number of minutes used in the month. Choose a flat monthly rate and cost per minute and insert the values you have chosen for M and B into the equation. Then use this equation to find the total monthly cost C if 68 minutes are used.
You are given an equation and told to select any value of choice for M and B.
Then plug that into the given equation and simplify using 68 for X.
In other words, solve for C.
Since we are allowed to select a value for M and B, I will do just that.
The question also tells us to let X = 68.
I will select M = 35 cents.
I will select B = $20.
Then we plug and chug.
C = MX + B
C = (0.35)(68) + 20
C = 23.80 + 20
C = $43.80
The answer is C = $43.80 for the numbers I selected.
Why don't you do the same? Select one value for M and one for B and simplify just as I did. Then tell me what your answer you came up with. If this question is a homework question, you will soon learn that everyone in your class will have a different answer for C.
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