Question

Va rog sa ma ajutati

Answer 1

3. a) 5/12 x 360 = 5 x 30 = 150

30/100 x 50 = 30/2 = 15

b) 6/x = y/5 => 6 x 5 = xy => xy = 30

128-3x30 = 128-90 = 38

4. a) 16/21 = 0,761

5/7 = 0,714 => 16/21 > 5/7

b) 6/(a-3) </ 3 => 3x(a-3) </ 6 => 3a-9 </ 6 => 3a </ 6+9 => 3a </ 15 => a </ 15/3 => a </ 5 => a∈(-∞,5]

c) ordinea este: 2/15, 2/11, 2/10, 2/7, 2/5, 2/3