Part b: let be the set of even integers; that is, e = { x e z:
2|x}. prove by contradiction that e has no smallestelement

part c: prove that if a is a subset z has a smallest element, it is
unique.

Which expressions are equivalent to the one below? check all that apply. 25x/5x a. 5x b. 5 c. 5x•5x/5x d. 25x e. (25/5)^x f. (25-5)^x

Frank has $66.50 in his account on sunday. over the next week, he makes the following changes to his balance via deposits and purchases: day debit ($) credit ($) monday 60.33 80.75 tuesday 54.45 wednesday 49.20 15.00 thursday 35.40 friday 16.85 75.00 saturday 80.56 on what day does frank first get charged an overdraft fee? a. wednesday b. thursday c. friday d. saturday select the best answer from the choices provided a b c d

Which of the following answers is 5/25 simplified? 1/5 5/5 2/5 1/25