HURRY!

What is the factored form of the polynomial?

z2 − 10z + 25

(z − 5)(z − 5)

(z + 5)(z + 5)

(z − 2)(z + 5)

(z + 2)(z − 5)

Evaluate cos2θ for cosθ = square root of 3/2

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]