In how many ways can you select two people from a group of 18 if the order of selection is not important?

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap

Which best describes the construction of a triangle if given the segment lengths of 2 cm, 3 cm, and 5 cm? a) unique triangle b) cannot be determined c) triangle not possible d) more than one triangle