Four times a certain number plus two is equal to twice the number plus sixteen. what is the number? how to solve it with the answer please​

Plzzz asapppppp what is the inverse of f if f(x)=^3 sqrt x-5

(a) compute the maclaurin polynomial m2(x) for f(x) = cos x. (b) use the polynomial of part (a) to estimate cos π 12. (c) use a calculator to compute the error made using the estimate from part (b) for the value of cos π 12. remember that the error is defined to be the absolute value of the difference between the true value and the estimate.

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?