PLZ HELP ME WITH THIS ITS DUE SOON AND IDK HOW TO DO IT :(

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

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.