15 customers select white frames. 30 customers select black frames. 45 customers select gold frames. If there are a total of 2 , 200 customers that order from the frame store one month, what is the best approximation for how many customers that month select a black frame?

the solution is 12x-6y

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.