Adding negative numbers on the num Which number line model represents the expression -4.5+(-3.5)?
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nope.   happens to me as well.

-aparri

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system