Task: Adding and Subtracting Expressions (Part 1) (3x2-2x+1)+(x2+4x-3)

(Part 2) (5x+4)-(-2x+3)

(Part 3) -2y2-(y2+y)

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

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.

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.