Simplify. Assume that all variables represent positive real numbers.- 
A. -7
B. -6
C. 7
D. -5
Answer: D
Mathematics
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Find parametric equations for the line described below.The line through the point P(7, -4, 0) and perpendicular to the plane 
A. x = -4t - 7, y = -4t + 4, z = -7t B. x = -4t + 7, y = -4t + 7, z = 0 C. x = 4t - 7, y = 4t + 4, z = 7t D. x = 4t + 7, y = 4t - 4, z = 7t
Mathematics
Factor completely.8a3 - 27b3
A. (2a + 3b2)(4a2 - 6ab + 9b2) B. (2a - 3b)(4a2 + 6ab + 9b2) C. (2a - 3b)(4a2 + 9b2) D. (8a - 3b)(a2 + 6ab + 9b2)
Mathematics
Find the root.
A. 4 B. Not real number C. 2 D. 2.497
Mathematics
Solve the inequality symbolically. Express the solution set in interval notation.25y + 40 > 5(4y - 1)
A. (-9, ?) B. (25, ?) C. (-?, 25) D. (-?, -9)
Mathematics