Determine, without graphing, whether the given quadratic function has a maximum value or a minimum value and then find that value.f(x) = -3x2 - 9x
A. maximum; - 
B. minimum; - 
C. maximum; 
D. minimum; 
Answer: C
Mathematics
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Provide an appropriate response.The standard normal probability density function is defined by f(x) = 
e- x2/2. (a) Show that 
dx = 
.(b) Use the result in part (a) to show that the standard normal probability density function has mean 0.
What will be an ideal response?
Mathematics
Find the related angle for the given angle.225°
A. 45° B. 90° C. 30° D. 60°
Mathematics
Express the phrase as a ratio in lowest terms.135 cm to 75 cm
A. 
B. 
C. 
D. 
Mathematics
Determine whether the pair of lines is parallel, perpendicular, or neither.y + 6 = -4x4y = 12x - 13
A. Parallel B. Perpendicular C. Neither
Mathematics