This exercise concerns subgroups of Z x Z. a. Let C1 = {(a, b) ∈ Zx Z | a = b} Show that C1 is asubgroup of Z x Z.
b. For each positive integer n >= 2, let Cn = {(Cn ={(a, b) ∈ Z x Z|a b (mod n)}.Show that Cn is a subgroup of Z x Z.
c. Show that every subgroup of Z xZ that contains C1 has the formCn, for some positive integer n.

Me! last question, and i'm stuck! write the algebraic expression that models the word phrase. the product of 2 divided by the number h and 8 more than the number k

Powerful women's group has claimed that men and women differ in attitudes about sexual discrimination. a group of 50 men (group 1) and 40 women (group 2) were asked if they thought sexual discrimination is a problem in the united states. of those sampled, 11 of the men and 19 of the women did believe that sexual discrimination is a problem. if the p-value turns out to be 0.035 (which is not the real value in this data set), then at = 0.05, you should fail to reject h0. at = 0.04, you should reject h0. at = 0.03, you should reject h0. none of these would be a correct statement.

Solve for b. ab + c= d b= a + old ob=allc-ch b= (d-c/a