Chapter 6 Review Pull out a pencil (and any colors you need) and a calculator. Plus pick up a review sheet from Mrs. Proudfit’s desk.

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Presentation transcript:

Chapter 6 Review Pull out a pencil (and any colors you need) and a calculator. Plus pick up a review sheet from Mrs. Proudfit’s desk.

Problem #1 Which system of equations is best solved by using substitution?

Problem #2 Solve this system of equations.1.(2, 3) 2.(3, 2) 3.(-2, -3) 4.(-3, -2)

Problem #3 Jonathon and Raymond earn a base salary plus commission. Jonathon earns $1500 plus 10% of his sales each month. Raymond earns $1200 plus 15% of his sales each month. How much will Jonathon and Raymond need to sell in order to earn the same amount each month? 1.$60 2.$ $21,000 4.$54,000

Problem #4 Solve this system of equations.1.(-4, -1) 2.(4, -1) 3.(4, 1) 4.(-4, 1)

Problem #5 Download Central offers a free membership and unlimited mp3 downloads for $25 each month. Save & Download charges $5 each month for a membership and $1 per mp3 download. How many mp3s must Grant download for the cost at both companies to be the same?

Question #6 The graph shows the amount of profit for two companies. What does the solution x = 3 represent? 1.The two companies never have the same amount of profit. 2.After three years, the companies both have $425 in profit. 3.After two years, the companies both have $425,000 in profit. 4.After three years, the companies both have $425,000 in profit.

Question #7 When is graphing a system of equations a good method to determine a solution? 1.when the numbers are easy to graph 2.when an exact solution is needed 3.when one variable can be easily isolated 4.when the coefficients of like terms are multiples

Question #8 How many solutions does this system of equations have? infinitely many

Question #9 Two plumbers charge different rates for service. The first plumber charges $100 per service call plus $25 per hour of service. The second plumber charges $50 per service call plus $50 per hour of service. After how many hours do the plumbers charge the same amount?