Solve for m when: 3-2m=-1

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.

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

Simplify the expression. -2/5(10+15m-20n)