Melody

$$\dfrac{w}{3w^2y}=\dfrac{1}{3wy}$$

V = area of the triangle x depth

$${\mathtt{4}}{\mathtt{\,\times\,}}{\mathtt{15}}{\mathtt{\,\small\textbf+\,}}{\mathtt{5}}{\mathtt{\,\times\,}}{\mathtt{9}} = {\mathtt{105}}$$ dollars

Your brackets do not make sense. 

More info needed.

How many of who didn't fail.

Girls? Sophomore girls? class members? 

Happy and Brittany,

Some countries use a comma instead of a point to indicate a decimal number.

The question asker is telling you that they are from one of these countries.    

So the numbers are

31.5,     5.4,     18.9,     18.89,     10.8,     9,     9.01,     15.3          The magic number is 60 (+and - only)

This is a good answer Brittany  

Yes but how many bob can we have Chris?