Answer:12/7
Step-by-step explanation:
7b-4=8
7b-4+4=8+4
7b=12
b=12/7
2 - b.
3 - a.
I'm not sure about 4. Hope this helps!
Answer:
(4/15)
Step-by-step explanation:


1- Multiply the numerators:

2- Multiply the denominators:

3- Thus:

Hope this helps ;)
Answer:
l
Step-by-step explanation:
<span>the probability of drawing a blue marble at random is 5/20 = 1/4
answer
1/4
hope it helps</span>