Hi there! :)

h(x) = 1/2x + 4
Substitute in -4 for "x" to solve for h(-4):
h(-4) = 1/2(-4) + 4
h(-4) = -2 + 4
h(-4) = 2
Since we are solving for h(-4) + 2, add:
2 + 2 = 4.
-8 in account
adds 12 dollars
-8 (+12) = 4
Jon now has 4 dollars in his account
i don't know how to explain the zero part well, but it is like the place where your bank have to be in order to not have debt
You would need 3 cups of water to keep all the flowers alive.
Mabel bought 6 more golf balls then Allen
Work:
Step 1: 17 - 5 = 12
Step 2: 12 divided by 2 = 6
Hope this helps!