Keiko can choose Plan A or Plan B for her long distance charges. For each plan, cost (in dollars) depends on minutes used (per month) as shown below. Plan A 39 36- Plan B 33- 30 Cost 27 (in dollars) 24 21- 18- 15- 12- 3- 25 75 100 125 1so 17s 200 225 250 275 300 325 350 375 Minutes used (per month) (a) If Keiko makes 100 minutes of long distance calls for the month, which plan costs more? ? O Plan A O Plan B How much more does it cost than the other plan? (b) For what number of long distance minutes do the two plans cost the same? If the time spent on long distance calls is less than this amount, which plan costs more? O Plan A O Plan B

Keiko can choose Plan A or Plan B for her long distance charges. For each plan, cost (in dollars) depends on minutes used (per month) as shown below. Plan A 39 36- Plan B 33- 30 Cost 27 (in dollars) 24 21- 18- 15- 12- 3- 25 75 100 125 1so 17s 200 225 250 275 300 325 350 375 Minutes used (per month) (a) If Keiko makes 100 minutes of long distance calls for the month, which plan costs more? ? O Plan A O Plan B How much more does it cost than the other plan? (b) For what number of long distance minutes do the two plans cost the same? If the time spent on long distance calls is less than this amount, which plan costs more? O Plan A O Plan B

Algebra for College Students

10th Edition

ISBN:9781285195780

Author:Jerome E. Kaufmann, Karen L. Schwitters

Publisher:Jerome E. Kaufmann, Karen L. Schwitters

Chapter12: Algebra Of Matrices

Section12.CM: Cumulative Review Problem Set

Problem 114CM

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