What is the difference between 4x and x to the fourth power?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs