Charles has $1600 dollars in his account and makes automatic $400 monthly payments on a utility bill.

ok

Step-by-step explanation:

he has 1200 left a month

assuming you mean addition: addition and subtraction are reverse operations.

step-by-step explanation:

(1, –1), (16, –4), (36, –6)

step-by-step explanation:

given that the function is

this can also be written as

we have to graph this function and check which list of points lie on the graph

see attachment for graph:

we find that the points lying are (1,-1) (16,-4) and (36,-6)

since square root is there we find that x can only be posiitve but y can be since square root both positive and negative.