Final answer:
The missing value is y/2.
Step-by-step explanation:
The inverse of the function f(x) = 1/2 x + 10 is h(x) = 2x. To find the missing value, we need to solve for x in the equation h(x) = 2x. Since h(x) is the inverse of f(x), we can set h(x) equal to the missing value and solve for x.
Let's substitute h(x) with the missing value, denoted as y: 2x = y.
To solve for x, divide both sides of the equation by 2: x = y/2.
Therefore, the missing value is y/2.