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9) A rectangular Persian carpet has a perimeter of 240 inches. The length of the carpet is 30 inches
more than the width. What are the dimensions of the carpet?
A) 105 in., 135 in. B) 90 in., 120 in. C) 75 in., 105 in. D) 45 in., 75 in.

How do you solve a question like this?

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.

Determine which postulate or theorem can be used to prove that lmn =nmo