Type of small snail is very widespread in japan, and colonies of the snails that are genetically similar have been found very far apart. scientists wondered how the snails could travel such long distances. a recent study1 provides the answer. biologist shinichiro wada fed live snails to birds and found that of the snails were excreted live out the other end. the snails apparently are able to seal their shells shut to keep the digestive fluids from getting in.

in simplified version   it would be x ≤-4

step-by-step explanation:

multiply each term in x ≤-4 by -1

translate k to n and reflect across the line containing jk.

coins of silver or gold

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: