Determine the principal value without using a calculator.3
A. 9
B. 5
C. Not real number
D. 3
Answer: D
Mathematics
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Match the system of equations with one of the graphs.x2 - y2 = 9x2 + y2 = 25
A. 
B. 
C. 
D. 
Mathematics
Represent the vector in the form v = ai + bj whose magnitude and direction angle are given.
= 10; ? = 120°
A. v = 5
i - 5j
B. v = -5i + 5
j
C. v = -5
i + 5
j
D. v = 5i - 5
j
Mathematics
Solve the system of equations by elimination.6x + 3y = 512x - 6y = 38
A. (3, -10) B. (10, -3) C. (-3, 10) D. (-10, 3)
Mathematics
Use the calculator graph to find the solution set of the given equation or inequality.
? 
A. (-?, 2] B. (-?, 3] C. [2, ?) D. [3, ?)
Mathematics