I will give you brainlist if you have a valid answer

A. For 16 cups of lemonade he needs 80 cups of water.

B.  The rate of change is 1/5 for every cup of lemonade it needs 5 cups of water.

C. He should use the second recipe because 13+3=16 and 65+15=80

He will have enough for 16 cups of lemonade mix and 80 cups of water.

Step-by-step explanation:

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3