Предмет: Математика, автор: vika15023

о Упростите выражение: 1) - 4,2x•(-6y); 2) 8m + 5p-13т - р; 3) k-(17-k)+(-k+30); 4) -6(4+ a)+8(a-6).

Ответы

Автор ответа: Orangesss

5

Ответ:

$1)\ -4,2x\cdot(-6y)=25,2xy.\\2)\ 8m+5p-13t-p=8m+4p-13t.\\3)\ k-(17-k)=k-17+k=2k-17.\\4)\ -6(4+a)+8(a-6)=-24-6a+8a-48=2a-72.$

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