What is the sum of 1+2++50?​

If lmn=xyz, which congruences are true by cpctc? check all that apply

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.

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83