Mr scruggs got some money for his birthday, he spent 1/5 of it on dog treats. then he decided the remainder equally among his 3 favorite charities

Which expressions are equivalent to k/2 choose 2 answers: a k-2 b 2/k c 1/2k d k/2 e k+k

Hi, can anyone show me how to do this problem? 100 points for this. in advance

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6