Выражение и найти его значение : а) 7.5х+4.6х-3.7х+0.5 при х=0.01 б) 3*(5.6х+3.7)+4*(2.8х-0.9) при х=0.1

1) 7.5х+4.6х-3.7х+0.5=7.5×0.01+4.6×0.01-3.7×0.01+0.5=0.075+0.046-0.037+0.5=0.584
2) 3(5.6х+4.7)+4(2.8х-0.9)=16.8х+14.1+11.2х-3.6=16.8×0.1+14.1+11.2×0.1-3.6=1.68+14.1+1.12-3.6=13.3