Technically, 3*0=0 is the Multiplication Property of Zero. But any form of multiplication is the Commutative Property.
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3x0 is eqaul to nothing because anything times o is always o so maybe the equal number is always going to be o
= x²-3x0 =
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The answer is -13 1/3ohere is the detailed calculation for the problem:Let x0 be the angle, then;(180 - x0) - 2[180 - (90 - x0)] =40(180 -x0) - 2[90+x0]=40180 -x0 - 180 - 2x0=40-3x0=40hencex0= -13 1/3oAny comments are welcome