Let a, b∈g, where g is a group. then which one of the following statement is not true.
a)if a, b,ab have same order then ab=ba
b)if a^3=e, the identity element of g and aba^-1=b^2 then order of b=16
c)ab and ba have same order
d)b and aba^-1 have same order

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

Can some one me with these questions

50 plz, given the system of equations, match the following items. x + 3 y = 5 x - 3 y = -1 a) x-determinant b) y-determinant c) system determinant match the following to the pictures below.