Dominoes are small rectangular tiles with dots called spots or pips embossed at both halves of the tiles. A standard "double-six" domino set has 28 tiles: one for each of the unordered pair of integers from (0,0) to (6,6). In general, a "double-n" domino set would consist of domino tiles for each ordered pair of integers from (0,0) to (n, n). Determine all values of n for which one constructs a ring made up of all the tiles in a double-n domino set.

Write a method named addall that could be placed inside the hashintset class. this method accepts another hashintset as a parameter and adds all elements from that set into the current set, if they are not already present. for example, if a set s1 contains [1, 2, 3] and another set s2 contains [1, 7, 3, 9], the call of s1.addall(s2); would change s1 to store [1, 2, 3, 7, 9] in some order. you are allowed to call methods on your set and/or the other set. do not modify the set passed in. this method should run in o(n) time where n is the number of elements in the parameter set passed in.

Ulia is planning to attend the same private four-year college her parents attended. she wants to save at least $18,000 in four years to contribute to her college education. which monthly deposit amounts can julia use to achieve her goal? check all that apply.

Use the keyword strategy to remember the meaning of the following word. the meaning for the word has been provided. write your keyword and describe the picture you would create in your mind. obfuscate: to make something so confusing that it is difficult to understand.