Six times a number n decreased by 4 times a number n is -30.
What is the number?

What is the result of adding the system of equations? 2x+y=4 3x-y=6

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.

Which of the following represents the factorization of the trinomial below? x^2+7x-30