I don't think there is a ratio for that I have only herd of stuff like "What is the ratio of 5 to 3.
Answer:
(-2,-2) and (-7,1)
Step-by-step explanation:
I can't see i am trying
For this case we have that by definition, the density is given by:

Where:
M: It is the mass of the diamond
V: It is the volume of the diamond
According to the data of the statement we have:

So the volume is:

Thus, the volume of the diamond is approximately 
Answer:

$91/ 7 = $13 per dog
$117/$13 = 9 dogs
He washed 9 dogs