Question

Varog dau coroana 4,5,6

Answer 1

Răspuns:

Explicație pas cu pas:

4) 2,25*3,05 = 6,8625 mp

6,8625*200  = 1372,5 lei

5) a/3 =b/5= c/6 = d/9 =k

a=3k, b =5k, c =6l, d = 9k

a+b+c+d = 3k+5k+6k+9k = 92

23k = 92,  k = 92/23 = 4

a =12, b=20, c =24, d =36

6) 2x +35 + x -12 = 180

3x + 23 = 180

3x = 180 - 23 = 157 = 156 +1

x = (156 +1)/3 = 52° si 1/3° = 52°20'

<AOB = 2*(52°20') -35° =

   104°40' +35° = 139°40'

<BOC = 52°20' - 12° = 40°20'