What is the determinant of the coefficient matrix of the system {-3x+2y-6z=5 {-7x+9y-1z=4 {-2x+5y+2z=9

Given the function f(x) = log base 4(x+8) , find the value of f^-1(2)

Adecibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function. a whisper has a sound intensity of 30 decibels. use your graph to you complete the following statement. the sound intensity of a whisper is times the reference intensity.

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2