Rewrite each expression using exponents (-19)(-19)(-19)(-19)(-19)

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18

What is y times x by? y is __ times x

The coverage of a base station of a telecommunication company forms a disk with a radius of (kilometers). let be the distance of a cellphone from a base station. assume that the location of cellphones in use are randomly uniformly distributed within the disk. calculate the mean and variance for the random variable.