I need help and the first person who answer correctly gets a BRANLIST​

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

Determine the solution for mc001-1.jpeg

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.