What do the three red tiles in the model of the equation below represent? –3 3 –3x 3x.

By what percent will the product of two numbers change, if the first number increases by 70%, while the second number decreases by 40%.

The graph shows the populations of two species over time. which type of symbiotic relationship does the graph represent? a. commensal b. mutualistic c. parasitic d. parent-offspring e. predator-prey

In this food web, which group would increase in number if snakes were eliminated? a. producers b. decomposers c. primary consumers d. secondary consumers e. tertiary consumers