Please help me with 19 and 20
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Adding and subtracting matricesfind the value of each variable. x = and y = would
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Evaluate the expression for the given value of the variable. | ? 4 b ? 8 | + ? ? ? 1 ? b 2 ? ? + 2 b 3 -4b-8+-1-b2+2b3 ; b = ? 2 b=-2
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