What are the coordinates of the vertex of the graph of the function y=-3x^2 -12x+3? A. (-2, 29)
B. (2.-15)
C. (2.-9)
D. (-2, 15)

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Graph the system of equations. {6x−4y=−244x−8y=−32 use the line tool to graph the lines.

Write the equations in logarithmic form 10^3=1,000