Question

Rapid
Ex 6,7
Dau coronițe

Answer 1

Răspuns:

Explicație pas cu pas:

6.

0,4(2) = (42 - 4)/90 = 38/90

0,2(4) = (24 - 2)/90 = 22/90

38/90 : 22/90 = 38/90 * 90/22 = 38/22 = 19/11

AND/DAN = 19/11

AND = 19DAN/11

AND + DAN = 90°

19DAN/11 + DAN = 90°

19DAN/11 + 11DAN/11 = 90°

30DAN/11 = 90°

DAN = 90°*11/30 = 33° grade

AND = 90° - 33° = 57°

_________________

7.

x/y = 2/3 rezulta x = 2y/3

y/z = 5/4 rezulta z = 4y/5

x + y + z = 185

2y/3 + y + 4y/5 = 185

10y/15 + 15y/15 + 12y/15 = 185

37y/15 = 185

y = 185*15/37 = 75

x = 2*75/3 = 50

z = 4*75/5 = 60

75 = 3*5^2

50 = 2*5^2

60 = 2^2*3*5

c.m.m.m.c. = 3*5^2*2^2 = 3*25*4 = 300