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1 1 of 6 9/4/2012 6:43 PM 4. Quiz Ch 4 ( ) Question Question Details McKEAlg [ ] Solve the following system of linear equations by graphing. (Examples 15. If the system has no solution, enter NO SOLUTION for each answer. If the system has infinitely many solutions, enter INFINITELY MANY for each answer.) 2. Question Details McKEAlg [ ] Solve the following system of linear equations by graphing. (Examples 15. If the system has no solution, enter NO SOLUTION for each answer. If the system has infinitely many solutions, enter INFINITELY MANY for each answer.)

2 2 of 6 9/4/2012 6:43 PM 3. Question Details McKEAlg [ ] Jane is deciding between two sales positions. She can work for Marcy's and receive $7.00 per hour or for Gigi's, where she earns $5.00 per hour but also receives a $30 commission per week. The two lines in the following figure represent the money Jane will make for working at each of the jobs. (a) From the figure, how many hours would Jane have to work to earn the same amount at each of the positions? hr (b) If Jane expects to work less than 12 hours a week, which job should she choose? Marcy's Gigi's (c) If Jane expects to work more than 18 hours a week, which job should she choose? Marcy's Gigi's 4. Question Details McKEAlg [ ]

3 3 of 6 9/4/2012 6:43 PM Solve the following system of linear equations by elimination. (Examples 13, 78. If there is no solution, enter NO SOLUTION for each answer. If there are infinitely many solutions, enter INFINITELY MANY for each answer.) 5. Question Details McKEAlg [ ] Solve the following system of linear equations by elimination. (Examples 13, 78. If there is no solution, enter NO SOLUTION for each answer. If there are infinitely many solutions, enter INFINITELY MANY for each answer.) 6. Question Details McKEAlg [ ] Solve the following system by eliminating the x variable. (Examples 4, 6, 8. If there is no solution, enter NO SOLUTION for each answer. If there are infinitely many solutions, enter INFINITELY MANY for each answer.) 7. Question Details McKEAlg [ ] Solve the following system of linear equations by the elimination method. (Examples 38. If there is no solution, enter NO SOLUTION. If there are infinitely many solutions, enter INFINITELY MANY for each answer.) 8. Question Details McKEAlg [ ] Solve the following system by substitution. Substitute the expression in the second equation into the first equation and solve. (Examples 1, 2. If there is no solution, enter NO SOLUTION for each answer. If there are infinitely many solutions, enter INFINITELY MANY for each answer.) 9. Question Details McKEAlg MI. [ ] Solve the following system by substitution. Substitute the expression in the second equation into the first equation and solve. (Examples 1 2. If there is no solution, enter NO SOLUTION for each answer. If there are infinitely many solutions, enter INFINITELY MANY for each answer.) 2x 3y = 21 x = y Question Details McKEAlg [ ] Solve the following system by solving one of the equations for x or y and then using the substitution method. (Examples 3,

4 4 of 6 9/4/2012 6:43 PM 4. If there is no solution, enter NO SOLUTION for each answer. If there are infinitely many solutions, enter INFINITELY MANY for each answer.) 11. Question Details McKEAlg [ ]

5 5 of 6 9/4/2012 6:43 PM Daniel is trying to decide whether to buy a car or a truck. The truck he is considering will cost him $150 a month in loan payments, and it gets 20 miles per gallon in gas mileage. The car will cost $180 a month in loan payments, but it gets 35 miles per gallon in gas mileage. Daniel estimates that he will pay $2.50 per gallon for gas. This means that the monthly cost to drive the truck x miles will be the following y = x The total monthly cost to drive the car x miles will be the following y = x The following figure shows the graph of each equation. (a) At how many miles do the car and the truck cost the same to operate? mi (b) If Daniel drives more than 800 miles, which will be cheaper? the car the truck (c) If Daniel drives fewer than 400 miles, which will be cheaper? the car the truck (d) Why do the graphs appear in the first quadrant only? The vehicles will get fewer miles per gallon as they age. The loan payments will rise. We are only working with positive numbers. The price of gas will continue to rise. 12. Question Details McKEAlg [ ] The sum of two numbers is 12. One number is 5 times the other. Find the numbers. (Example 1) (smaller value) (larger value)

6 6 of 6 9/4/2012 6:43 PM 13. Question Details McKEAlg [ ] Diane has $1.85 in dimes and nickels. She has a total of 23 coins. How many of each kind does she have? (Example 3) nickels dimes 14. Question Details McKEAlg [ ] Suppose Tom has 17 coins totaling $2.60. If he has only dimes and quarters, how many of each type does he have? (Example 3) dimes quarters 15. Question Details McKEAlg [ ] For a Saturday matinee, adult tickets cost $7.50 and kids under 12 pay only $2.00. If 59 tickets are sold for a total of $173.00, how many of the tickets were adult tickets and how many were sold to kids under 12? adults kids 16. Question Details McKEAlg MI. [ ] Two positive numbers have a difference of 14. The larger number is six more than twice the smaller. Find the two numbers. (Example 1) (smaller value) (larger value) Assignment Details Name (AID): 4. Quiz Ch 4 ( ) Submissions Allowed: 3 Category: Quiz Code: Locked: No Author: Lie, Wen Seng ( wlie@bmcc.cuny.edu ) Last Saved: Sep 4, :42 PM EDT Permission: Protected Randomization: Person Which graded: Last Feedback Settings Before due date Question Score Assignment Score Question Part Score Mark Response Save Work After due date Question Score Assignment Score Publish Essay Scores Key Question Part Score Solution Mark Add Practice Button Help/Hints Response

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