Select all equations that are equivalent to x^2+6x=16

Find the value of x. give reasons to justify your solutions! l, m ∈ kn

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.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)