What happened to the plant in math class?

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

What could explain what happened when the time was equal to 120 minutes

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.