Density = mass/volume
D = m/v
v*d = m
v = m/d
m/d = v
The final answer is choice C
I’m not sure what the choices are so I don’t know what the correct answer is but expressions that could be equivalent are
r+r+t+r
3r+t


To solve this, we have to simplify these numbers by adding like terms.


Next, we factor our expression. To do so, we look for the greatest common factor of 42 and 14, which is 14. We know that because 42 divided by 14 is 3.

