Biodiversity can be affected by

human activity
changes in population size
all of the above
changes in climate

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?

Describe the symmetry of the figure. identify lines of symmetry, if any. find the angle and the order of any rotational symmetry.

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?