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Systems of Linear Equations in Trigonometry: Homework Help 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. 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 2 2.

Solve this system.

x + y = 6

y = 2x

Question 3 3. How many solutions does this system have?

Question 4 4. A car company has $44,000 to spend on robots to put paint on new cars. There are 2 types of robots, some that cost $3,000 and some that cost $2,000. If the company is sure that it wants to spend all of its money on 16 new robots, how many of each should it purchase?

Question 5 5. Based on this graph, what is the solution to the system of equations?

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Question 6 6.

Solve the following system of equations:

2x - 3y = 21 and 5x + 4y = 18

Question 7 7. How many solutions does this system have?

Question 8 8.

Solve.

x - y = 6

x + y = 10

Question 9 9. How many more equations are needed to complete this linear system with three variables?

Question 10 10.

Which of the following represents a valid first step to solving this system of equations using the substitution method?

2x - y = 7

x = 2y - 1

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Question 11 11. Which graph does NOT represent a system of equations?

Question 12 12. If two equations produce a false statement in a linear system in three variables, how many solutions does this system have?

Question 13 13.

Which equation represents a valid first step to solving the following system of equations using the elimination method if our next step is to add the equations together to eliminate the x variable?

2x - 2y = 5 and -4x + 5y = 11

Question 14 14. If a linear system has three variables, how many equations are needed to complete the system?

Question 15 15.

Solve the system of equations below:

y = 3x - 5

y = -2x + 10

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Question 16 16. When trying to figure out how many $5 burritos and $3 tacos to buy, which equation represents the situation where you have $100 to spend?

Question 17 17. Which method can be used to solve any system of linear equations in two variables?

Question 18 18. Which of the following is a solution to the system of equations shown in the graph below?

Question 19 19. What is the first step in the substitution method?

Question 20 20.

Solve this system.

4x + y = 12

x + y = 6

Systems of Linear Equations in Trigonometry: Homework Help 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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