Which expression would be easier to simplify if you used the commutative property to change the order of the numbers?
A. 130 + 70 + (-61)
B. 1/4 + 1/2 + 3/4
C. 3/2 + 1/2 + (-57)
D. -30 + (-90) + 12

the answer will be

it is x=-4

step-by-step explanation:

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation: