What number must be added to complete the square? x^2-20x=17

Which expression is equivalent to -5(3x - 6/7)

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

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.