Using the calculation above, mark the statements below that must be true. A. Span(x, z) = Span(w, x, y) B. Span(w, x, z) = Span(y, z) C. Span(w, z) = Span(w, x, z) D. Span(w, x) = Span(w, z) E. Span(w, y, z) = Span(w, x)

chad should not have included the values (1, 2) and (3, 6) because that would mean he only had half a healing card.

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: