The sum of two numbers is
40
. one number is
4
times as large as the other.

Solve: 3x+y=6 4x-2y=18 show all work !

What are the domain and range of the function f(x)=2^x+1

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.