What is 221,000,000,000,000,000,000 expressed in scientific notation? 2.21 × 1021
2.21E20
2.21E21
2.21E-20
2.21 × 10-21
2.21 × 10-20
2.21 × 1020
2.21E-21

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:

srry ask agian

step-by-step explanation:

he is going to fill two shelves and the third shelf will only have five video games