Which of these sets of numbers is not an addition / subtraction fact family? A. 1,2,3 B.2,3,5 C. 2,4,6 D. 3,4,5

Does anyone know how to do geometryme with this problem

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.

Evaluate 3(a + b + c)squared for a = 2, b = 3, and c = 4. a. 54 b. 243 c.729 add solution .