Evaluate each expression. determine if the final simplified form of the expression is positive or negative.
1. -4^2 positive or negative?
2. (-4)^2 positive or negative?
3. 4^2 positive or negative?

You are making a battery for a science project. you have copper wire for your first electrode. you need to choose a conductor, a second electrode, and a device to plug into your battery. you have already chosen a lemon conductor. complete each statement below about the options that include a lemon conductor.

Graph the system of equations. {6x−4y=−244x−8y=−32 use the line tool to graph the lines.

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