Question

me ajudem nessas contas por favor

Answer 1

a) -10
b) 22
c) 5
d) 7
e) 25

Answer 2

a)5-15=10
b)3(7)+1=21+1=22
c)2(4)+3(-1)=8-3=5
d)2^2+4(2)-5=4+8-5=7

e)(42-(-2)+1).(42+4-1)
(42+2+1).(42+4-4)
(45).(42)=1890