Solve the system using matrices. 9x - 8y + 4z = -19-27x + 24y - 12z = 57 18x - 16y + 8z = -38
A. (-3, 1, 5)
B. No solution
C. (-3, -3, -4)
D. Infinitely many solutions
Answer: D
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Convert the radian measure to degree measure. Use the value of ? found on a calculator and round answers to two decimal places.
A. 
B. 36?°
C. 36°
D. 0.628°
Use the bar graph to answer the question.The bar graph below shows the number of students by major in the College of Arts and Sciences.
About how many students are in the College of Arts and Sciences?
A. 1225 students B. 1050 students C. 1325 students D. 1100 students
Use the Laws of Exponents to simplify. Write the answer with positive exponents. All variables are nonzero.
A. 
B. 
C. 
D. 
Solve the problem.A computer manufacturer has three outlet stores that sell its four computer systems. The following table shows the numbers of systems sold by the three stores in July.
The prices of the systems are: $1200 for System 1, $1500 for System 2, $1600 for System 3, and $2200 for System 4. Write the information from the table as a 4 x 3 matrix B. Write a row matrix A for which the entries represent the prices for the systems. If 
find c12. What does this entry of C represent?
A. c12 = 176,000. c12 represents the total sales at Store 3 in July. B. c12 = 156,000. c12 represents the sales of System 2 at all stores in July. C. c12 = 188,000. c12 represents the total sales at Store 2 in July. D. c12 = 166,000. c12 represents the total sales at Store 1 in July.