What is the missing number? imput b; 4,12,16,24,32,40. output a: 8,16, rules a=b+4. super urgent

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.

Solve 2x+y=3 x+y=5 in substitution method

The sum of two numbers is 12 and their difference is 18 what are the two numbers