A commericial for long-distance calling says their rate is just 7 cents per minute.
Another commercial says that their rate is just 3 cents per minute and 39 cents to connect.
1. What is the break point for which the cost is the same for both plans? What would the cost be?
2. How long would you have to talk so that you would be charged twice as much money for the first plan, as compared to the second one?
Pleas help, thank you so much!
Another commercial says that their rate is just 3 cents per minute and 39 cents to connect.
1. What is the break point for which the cost is the same for both plans? What would the cost be?
2. How long would you have to talk so that you would be charged twice as much money for the first plan, as compared to the second one?
Pleas help, thank you so much!
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1st phone plan would be 7 cents each minute, so, you would write: 0.07m (m = minutes)
the equation should be like: 0.07m =
now the 2nd phone plan says it is 3 cents each minute PLUS 39 cents. so you would put for the other half of the equation: 0.03m (for minutes) and for the connect cost, you would add: + 0.39
now the equation looks like this: 0.7m = 0.03m + 0.39
so the equation is formed and you just have to solve for the variable 'm'. thats it!
the equation should be like: 0.07m =
now the 2nd phone plan says it is 3 cents each minute PLUS 39 cents. so you would put for the other half of the equation: 0.03m (for minutes) and for the connect cost, you would add: + 0.39
now the equation looks like this: 0.7m = 0.03m + 0.39
so the equation is formed and you just have to solve for the variable 'm'. thats it!
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Answers.1) 9.75 minuted............2) 78 minutes
plan#1....for m minutes, cost = 7m............plan #2....cost = 3m + 39
if 7m = 3m + 39, then m = 9.75 minutes
if 7m = 2 (3m + 39 ) then m = 78 minutes.
plan#1....for m minutes, cost = 7m............plan #2....cost = 3m + 39
if 7m = 3m + 39, then m = 9.75 minutes
if 7m = 2 (3m + 39 ) then m = 78 minutes.
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1. 9.75 minutes. Cost: $68.25
2. 3 6/11 minutes
2. 3 6/11 minutes