Which must be true in order for the relationship △zyx ~ △wvu to be correct?

What 2 forces allow things to fall ‍♀️‍♀️

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.

Roger could feed 5 walruses with 4 kilograms of fish. how many walruses could he feed with 7.2 kilograms of fish?