QRB501 QRB/501 Final Exam Study Quide (50 questions and answers)

1) Write the following as an algebraic expression using x as the variable: Triple a number subtracted from the number 

2) Write the following as an algebraic expression using x as the variable: A number decreased by 25 and multiplied by 4 

3. Write the following as an algebraic expression using x as the variable: The sum of a number and -8

4) Write the following as an algebraic expression using x as the variable: Twelve less than six times a number 

5) Solve: -3 – (-2 + 4) – 5 

6) Solve: (–5)2 · (9 – 17)2 ÷ (–10)2

7) Solve: 3(32) – 8(9 – 2) ÷ 2

8) Solve: (–5)2 · (9 – 17)2 ÷ (–10)2

 9) Solve: 3(-19 + 4) ÷ -5

10) Solve: –9 + 18 ÷ –3(–6)

 11) Identify the variable, constant, and coefficient of the expression: 10k – 15

12) Identify the variable, constant, and coefficient of the expression: x – y

 13) Identify the variable, constant, and coefficient of the expression: 3p

14) Solve the system of equations:  4x + 3y = 1

3x + 2y = 2

 15) Solve the system of equations:  3x – 5y = 7

2x + 3y = 30

 16) Solve the system of equations:

3x + 2y = 18  y = 3x

 17) Solve the system of equations: 3x = 7 – y

2y = 14 – 6x

18) Solve the system of equations: 3x + y = –7

x – y = –5

19) The Manager of Engineering reported that the industrial production index was 135. What does this production mean?

 20) Which of the following is true of a base period for an index number?