If x equals 8 -(-2.25) and y equals 6-4.2-(-4.9) what is the value of x-y

x = 10.25

y = 6.7

Step-by-step explanation:

X = 8 - (-2.25) = 10.25

Y = 6 - 4.2 - (-4.9) = 6.7

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:

step-by-step explanation: