Evaluate the expression: 12 - 3 x 3 - 2

What are potential hypotheses (explanations) regarding why there are ecological equivalents between many metatherians and eutherians? discuss your hypothesis in terms of the processes that could lead to the current ecologies and distributions of metatherians and eutherians.

Which of the following is a proper fraction? a. 9⁄8 b. 5⁄6 c. 7⁄3 d. 4⁄2

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?