Substance Mass (8) Volume (cm) Aluminum 13.5
5
Gold
56.7 3
Mercury
121.5
9
Use the table to answer Exercises 7-9.
The information in the table can be used to
determine the density of each object. Density
describes how tightly the particles in an object
are packed together. You can find density by
dividing an object's mass by its volume.
7. Estimate the density of aluminum.
2.59 cm3
&. Is the density of gold greater than the density
of mercury? Explain.

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:

me

step-by-step explanation:

answer: c.  

step-by-step explanation:

mixtures containing substances that get attracted to magnet can be separated using a magnet. we can separate iron from a mixture of sand and iron, as only iron attracts to the magnet.