Question

itemul 1 si 2 va rog

Answer 1

1) a=-4+6=2
b=$\frac{4}{3}: \frac{2}{9}= \frac{4}{3}* \frac{9}{2}= 6$
a*b=2*6=12
2) m(<C)=180-n(<A)-m(<B)=180-40-80=60 
m(<BCD)=180-m(<C)=180-60=120