I think everything needed is given here...

G . A B D E F 1 Chapter 5 Problem 6 2 a. 3 Cost of Plan A: $20 + $.45(120) + $20(40) = 4. Cost of Plan B: $20 + $.55(120) +.15(40) = 5 Cost of Plan C: $20 + $80 + $.40(0) = 6 7 b. 8 Graph: Y= monthly cost; X minutes of daytime call) 9 10 Example Plan A Y= total of plan a (line 3 total); X = .45(120) 11 12 c. 13 Example of daytime 14 Cost of Plan A: $20 + $.45(120) 15 Cost of Plan B: $20 + $.55(120) 16 Cost of Plan C:(up to 200 minutes) $20 + $80 17 Cost of Plan C:(over 200 minutes) $20 + $80 +$.40(D-200) 18 18 19 1. Base on the total which plan can first be omitted? 20 2. Compare remaining two based on 1-200 minutes 21 3. Compare remaining two based on > 200 minute 22 23 Which plan is more optimal for daytime calls? 24 25 d. 26 Cost of Plan A: $20 + $.45(D) + $20(E) = 27 Cost of Plan B: $20 + $.55(D) +.15(E) = 28 29 Setting equal solving for D 30 Cost of Plan A: $20 + $.45(D) + $20(E) = Cost of Plan B: 20 + $.55 (D) + .15(E) 31 Step 1 32 $.45(D) - $.55(D) = $.15(E) -$.20E = -$.10D = -$.05E thus D =$-.05E/-$.10 33 Daytime (D) = .5E (evening) 34 If D $.10 and E $.05 what can we conclude about the difference in Plan A and Plan B 35 = G . A B D E F 1 Chapter 5 Problem 6 2 a. 3 Cost of Plan A: $20 + $.45(120) + $20(40) = 4. Cost of Plan B: $20 + $.55(120) +.15(40) = 5 Cost of Plan C: $20 + $80 + $.40(0) = 6 7 b. 8 Graph: Y= monthly cost; X minutes of daytime call) 9 10 Example Plan A Y= total of plan a (line 3 total); X = .45(120) 11 12 c. 13 Example of daytime 14 Cost of Plan A: $20 + $.45(120) 15 Cost of Plan B: $20 + $.55(120) 16 Cost of Plan C:(up to 200 minutes) $20 + $80 17 Cost of Plan C:(over 200 minutes) $20 + $80 +$.40(D-200) 18 18 19 1. Base on the total which plan can first be omitted? 20 2. Compare remaining two based on 1-200 minutes 21 3. Compare remaining two based on > 200 minute 22 23 Which plan is more optimal for daytime calls? 24 25 d. 26 Cost of Plan A: $20 + $.45(D) + $20(E) = 27 Cost of Plan B: $20 + $.55(D) +.15(E) = 28 29 Setting equal solving for D 30 Cost of Plan A: $20 + $.45(D) + $20(E) = Cost of Plan B: 20 + $.55 (D) + .15(E) 31 Step 1 32 $.45(D) - $.55(D) = $.15(E) -$.20E = -$.10D = -$.05E thus D =$-.05E/-$.10 33 Daytime (D) = .5E (evening) 34 If D $.10 and E $.05 what can we conclude about the difference in Plan A and Plan B 35 =