12 +4m = 24
4m = 12
m = 12/4
m = 3 so choice C. is right sure
Answer:
So do you already have the answer? Also 1/20 looks right.
Step-by-step explanation:
Answer:
C 40
Step-by-step explanation:
1 blue : 2 white
multiply both sides of the proportion by 20 to reach 20 blue marbles
20 blue: 40 white
Answer:
(6, 8)
Step-by-step explanation:

answer and explanation are in the picture.