Determine where the given function is concave up and where it is concave down. f(x) = x3 - 12x2 + 2x + 15
A. Concave up on (-?, 4), concave down on (4, ?)
B. Concave up on (-?, -4), concave down on (-4, ?)
C. Concave down on (-?, -4), concave up on (-4, ?)
D. Concave down on (-?, 4), concave up on (4, ?)
Answer: D
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Indicate the property that justifies the statement.(n + 2) ? 0 = 0
A. Distributive property B. Multiplicative inverse property C. Multiplication property of zero D. Additive identity property
Solve the system of equations graphically using a graphing calculator. Find all values to the nearest tenth.4x - y = -5y = 1 + 2x2
A. x = 2.7, y = 5.9; x = -0.7, y = -7.9 B. x = 2.7, y = 15.9 C. No solution D. x = 2.7, y = 15.9; x = -0.7, y = 2.1
Find y".y = 
A. - 
B. - 
C. 
D. - 
Write the vector v in terms of i and j whose magnitude 
and direction angle ? are given.
= 6, ? = 270°
A. v = -6i - 6j
B. v = -6i
C. v = -6j
D. v = 6