HELP! solving by substitution-day 2 solve the following system of equations.
{ x=-2y
{ x-y=9
(WORK MUST BE SHOWN)

Match each whole number with a rational, exponential expression 3 square root 27^2find the domain and range of the exponential function h(x)=125^x. explain your findings. as x decreases does h increase or decrease? explain. as x increases does h increase or decrease? explain.