Question

va rog 3,4,5,6 dau coroana

Answer 1

3. A\B = {1, 2}
4. a= 11, $\frac{a+b}{2} =12.5$ => a+b=25=>b=14
5. 5-3x=2=>3x=3=>x=1
6. latime=3/5 * 15dm=9dm=> perimetrul = 2*(latime+lungime)=2*(15+9)=2*24=48dm=4.8m

Answer 2

Rezolvarea mai jos!!!