PLEASE HELP ALGEBRA 1

Find two rational expressions that have the difference of 2-n/n-4

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

If angle 2=3x +1 and angle 3=2x +4what is angle 2