Evaluate the exponential function for the given x-values. y=3^-x

With this question! what is process of elimination? ? p. s. my brothers acc got banned so add his new one @ yamauchiyamyam17

Evaluate each expression. determine if the final simplified form of the expression is positive or negative -42 (-4)2 42

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.