Write the statement below as a biconditional. "a water molecule is composed of exactly 2 hydrogen and 1 oxygen atom" A)if a molecule is water, then it is composed of exactly 2 hydrofens and 1 oxygen atom.
B)a molecule is water if and only if it is not composed exactly 2 hydrogen and 1 oxygen atom.
C)a molecule is not water if and only if it is not composed of exactly 2 hydrogen and 1 oxygen atom.
D)a molecule is water if and only if it is not composed of exactly 2 hydrogen and 1 oxygen atom.

step-by-step explanation:

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below:

which expression represents the approximate length of bc?

step-by-step explanation:

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!