A periodic wave travels from one medium to another. Which pair of variables are likely to change in the process?

A.
velocity and wavelength

B.
velocity and frequency

C. frequency and wavelength

D. frequency and phase

E. wavelength and phase

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?

The domain of a function can be represented by which one of the following options? o a. a set of output values o b. a set of f(x) values o c. a set of input values o d. a set of both input and output values