What is f(g(13))? 16 26 32 The function is undefined. i know the answer but I dont quite know jow to do it pls help explain

1.) 2x + y = 3 2.) x - 2y = -1 if equation 1 is multiplied by 2 and then the equations are added, the result is a.3x = 2 b.3x = 5 c.5x = 5

Solve the system of equations. 2x-2y=-4 and x+y=8. show work

Ken earned $128 from his part-time job this summer. he spent 25% of his money on games. he is going to donate 1/6 of the remaining money to charity. how much money will the charity receive?