Use a graphing calculator to approximate all real solutions of the equation.y = x4 + 6x3 + 7x2 - 6x - 8
A. -4, -2, 1, 1
B. -1, 1, 2, 4
C. -2, -1, 1, 4
D. -4, -2, -1, 1
Answer: D
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Solve. Use ? = 3.14159 as needed.The blades of a fan have a radius of 15 in. and they turn one revolution every 0.075 sec. Calculate the linear speed of the tip of a blade. (Round to the nearest whole number, if necessary.)
A. 628 in./sec B. 800 in./sec C. 400 in./sec D. 1257 in./sec
Find the union or intersection as indicated.Find A ? B if A = {x|x < -4} and B = {x|x ? 5}
A. {x|x < -4 ? x ? 5} B. {x|x > -4} C. {x|-4 < x ? 5} D. ?
Find the intersection.8x - 4y - 6z = 6, -6x - 4y + 3z = 7
A. x = -36t - 
, y = 12t - 
, z = -56t
B. x = 2016t - 4, y = -672t - 92, z = 56t
C. x = 36t + 4, y = -12t + 92, z = 56t
D. x = -36t - 4, y = 12t + 92, z = 56t
Simplify the expression.
? 
A. 33
B. 4
C. 16
D. 