Question

Urgentttttttttttttt!!!!!!

Answer 1

6) 

Sa scriem intai acel raport sub o forma mai eleganta:
0.4(2)=(42-4)/90=38/90=19/45
0.2(4)=(24-2)/90=22/90=11/45
0.4(2)/0.2(4)=19/45*45/11=19*45/45*11=19/11

m(<AND)/m(<DAN)=19/11 => m(<AND)=19m(<DAN)/11

m(<AND)+m(<DAN)=90°
19m(<DAN)/11+m(<DAN)=90°
[19m(<DAN)+11m(<DAN)]/11=90°
30m(<DAN)=990°
m(<DAN)=33°
m(<AND)=19*33/11=57°

7)

x/y=2/3 => 3x=2y
y/z=5/4 => 4y=5z
3x=2y => x=2y/3=2*5z/4*1/3=10z/12
4y=5z => y=5z/4
x+y+z=185
10z/12+5z/4+z=185
10z/12+15z/12+12z/12=185
37z/12=185
37z=185*12
37z=2220
z=60
x=10*60/12=50
y=5*60/4=75

x=50=2*5²
y=75=3*5²
z=60=2²*3*5
cmmmc=2²*3*5²=400