The independent variable is:
cold coffee
because: just an educated guess
sorry this is a little hard but i hope this helps
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:

The answer is 3+-i
I hope this helps!!!!!!!!
Yes it is true because if 3x +15=2x+60 it is true
I actually think its b cause it can't be d (thats obvious) yh........but i might be wrong