Question

ex 11,14 ajutor va rog macar 1 ex.

Answer 1

11.
x/y=4/5
2y/x=2*5/4=10/4=5/2
5y/3x=5*5/3*4=25/12


14.
a/b=0,1(6)/15 = (1/6)/15=1/90
0,1(6)=(16-1)/90=15/90=1/6

a=(2 1/3-2):1/3+0,(56)×2-0,34=
=(7/3-2):1/3+56/99 ×2-34/100=
=(7-6)/3×3/1+112/99-17/50=
=1+112/99-17/50=
=(4950+112×50-17×99)/4950=
=8867/4950=1,79(13)
a/b=1/90
b=90a
b=8867/4950 ×90=8867/55=161,2(18)