Find the product.(4x + 9)(4x - 9)
A. 4x2 - 72x - 81
B. 16x2 - 72x - 81
C. 16x2 - 81
D. 16x2+ 72x - 81
Answer: C
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Use an identity to write the expression as a single trigonometric function or as a single number.
A. cot 13° B. tan 13° C. sin 13° D. cos 13°
Assume the distribution is normal. Use the area of the normal curve to answer the question. Round to the nearest whole percent.The mean clotting time of blood is 7.35 seconds, with a standard deviation of .35 seconds. What is the probability that blood clotting time will be less than 7 seconds?
A. 14% B. 15% C. 84% D. 16%
Select the graph of the equation as a circle, a parabola, an ellipse, or a hyperbola.
?
?
A. Hyperbola B. Circle C. Parabola D. Ellipse E. None of the above
Perform the indicated operation.(x + 4y)(-4x + 5y)
A. -4x2 - 11xy - 11y2 B. -4x2 - 11xy + 20y2 C. x2 - 11xy - 11y2 D. x2 - 11xy + 20y2