Divide and write the result in standard form.
A. 3i
B. 3i2
C. -3i
D. 9i2
Answer: C
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Change the order of integration and evaluate the integral.
A. 
?(15? - 16)
B. 
?(15? - 16)
C. 
?(15? - 8)
D. 
?(15? - 8)
Solve the problem by writing an appropriate system of equations and using the inverse of the coefficient matrix to solve the system.The sum of the ages of Art, Ben, and Cal is 59. Art is 1 year older than Cal and Cal is 1 year younger than Ben. Which of these people were teenagers 7 years ago?
A. Art, Ben, and Cal B. Ben C. Art and Ben D. Art
Decide if the set of ordered pairs does or does not represent a function.{(-5, 8), (-3, -9), (-1, -8), (-1, -3)}
A. Yes B. No
Solve the problem using matrices.The final grade for an algebra course is determined by grades on the midterm and final exam. The grades for four students and two possible grading systems are modeled by the following matrices. src="https://sciemce.com/media/4/ppg__tttt0518191431__f1q86g6.jpg" style="vertical-align: -15.0px;" />Find the final course score for Student 3 for both grading System 1 and System 2.
A. System 1: 44.2; System 2: 53
B. System 1: 85; System 2: 83
C. System 1: 77.2; System 2: 76
D. System 1: 67.4; System 2: 98.6
