Graph the equation.
+ 
= 1
A. 
B. 
C. 
D. 
Answer: B
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Find the values of x for which the given function is concave up, the values of x for which the function is concave down, and any points of inflection.y = x3 + 12x2 - x - 24
A. Concave down for x < -4, x > 4, concave up for -4 < x < 4, points of inflection at (-4, 108), (4, 108) B. Concave up for x < -4, concave down for x > -4, point of inflection at (-4, 108) C. Concave down for all x, no points of inflection D. Concave down for x < -4, concave up for x > -4, point of inflection at (-4, 108)
Graph the system of inequalities, and find the coordinates of the vertices.x - 2y ? 2 x + y ? 0
A. 
B. 
C. 
D. 
Solve the quadratic equation. Write complex solutions in standard form.x(x - 8) = -41
A. 9, -1 B. 4 + 5i, 0 C. 8 ± 10i D. 4 ± 5i
Solve the problem.Jim has gotten scores of 62 and 91 on his first two tests. What score must he get on his third test to keep an average of 80 or better?
A. at least 77 B. at least 76.5 C. at least 87 D. at least 85