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Creating Equations, Inequalities & Expressions Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. What type of equation is this?

Question 2 2. What is a Mathematical Model?

Question 3 3.

Solve the system of equations below:

y = 3x - 5

y = -2x + 10

Question 4 4. Consider the following two car rental companies. Cars R Us charges $100 up front, plus 10 cents per mile. Thrifty Car Rentals charges 25 cents per mile with no upfront fee. If TC represent the total cost for the car, and n represents the number of miles, which of the following systems of equations best represents this situation?

Question 5 5. What type of equation is this?

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Question 6 6. Based on this graph, what is the solution to the system of equations?

Question 7 7. How can you test two expressions to make sure they're equivalent?

Question 8 8.

If we plug 2 in for x in the following expressions, they both give the same answer:

2x - 1

3x / 2

Although both expressions yield the same solution in this case, why are they NOT equivalent?

Question 9 9. An ____ expression is a string of numbers, ____, mathematical operations, and possibly exponents.

Question 10 10. What is a very broad definition of mathematical modeling?

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Question 11 11. What type of equation is this?

Question 12 12. Which graph does NOT represent a system of equations?

Question 13 13. What type of equation is this?

Question 14 14. Which of the following is NOT an equivalent expression of a(a + 2x - x) - a^2 + 2?

Question 15 15. If you wanted to create a mathematical model to determine the size of a backyard in order to lay grass seed, what variables might you want to consider building into your model?

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Question 16 16. Which of the following is a solution to the system of equations shown in the graph below?

Question 17 17. What well-known mathematical model could you use to determine the size (in square feet) of your rectangular backyard?

Question 18 18. Which is an equivalent expression for x^2 + x?

Question 19 19. Why are models not always accurate?

Question 20 20. What type of equation is this?

Creating Equations, Inequalities & Expressions Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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