S=1+2+3+…+73. va rog ajutatima dau coruana e urgen

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

In a small section of a stadium there are 40 spectators watching a game between the cook islands and fiji. they all support at least one of the two teams. 25 spectators support the cook islands and 16 of these support both teams. how many support only fiji?

If 7x=9y, y/z = 7/5 , then x/z = (a) 2/7 (b) 7/9 (c) 9/5 (d) 9/7 (e) 5/9