An airplane travels 500 miles an hour.
How long will it take to travel 4.000 miles?

8 hours.

Step-by-step explanation: 4000 divided by 500 will give you 8. It will take the airplane 8 hours to travel 4,000 miles.

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i believe the answer is the polygon, heptagon.

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: