g495ycxh7q g495ycxh7q 17-11-2022 Mathematics contestada Simplify the expressions a) (30+10 ÷ 2)-5-10 b) (30 + 10) = 2.5-10 c) 30 + 10 = 2(5-10) (d) 30+ (10 ÷ 2·5)-10