Simplify. Express in terms of i.
A. 3
B. -3
C. -3i
D. 3i
Answer: D
Mathematics
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Factor completely.20x4 - 15x2 + 12x2 - 9
A. (20x2 - 3)(x2 + 3) B. (5x2 - 3)(4x2 + 3) C. (5x2 + 3)(4x2 - 3) D. (5x4 + 3)(4x - 3)
Mathematics
Find the extreme values of the function subject to the given constraint.
A. Maximum: none; minimum: 
at 
B. Maximum: none; minimum: 
at 
C. Maximum: none; minimum: 
at 
D. Maximum: none; minimum: 
at 
Mathematics
Solve the system by using the inverse of the coefficient matrix. 5x + 4y = 86x - 3y = 33
A. {(3, -4)} B. {(-4, 3)} C. {(-3, 4)} D. {(4, -3)}
Mathematics
Write the percent problem as an equation.Find 19.7% of 61.
A. n = 61% ? 19.7 B. n = 19.7% ? 61 C. n ? 19.7% = 61 D. 19.7 = n ? 61
Mathematics