What are the values of x and y? * the sum of all three angles inside a triangle are supplementary.

PART A
What is the value of x?

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Two numbers have a sum of -19. one number is x. what expression represents the other number?

The height of a birch tree, f(x), in inches, after x months is shown in the graph below. how much does the birch tree grow per month, and what will be the height of the birch tree after 10 months? a. the birch tree grows 1 inch per month. the height of the birch tree will be 16 inches after 10 months. b. the birch tree grows 2 inches per month. the height of the birch tree will be 26 inches after 10 months. c. the birch tree grows 3 inches per month. the height of the birch tree will be 36 inches after 10 months. d. the birch tree grows 2 inches per month. the height of the birch tree will be 24 inches after 10 months.