Answer:
#1- linear
#2- linear
#3- linear
#4- nonlinear
Step-by-step explanation:
A system of nonlinear equations is a system of two or more equations in two or more variables containing at least one equation that is not linear. A linear equation looks like any other equation. It is made up of two expressions set equal to each other. A non linear looks like a u shape when graphed and a linear equation looks like a diagonal or straight line when graphed.
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