Answer:
I think this is the answer
Area 77cm2
black ball and red ball
8 out of 12 x 4 out of 11
x 
=
= 0.24 = 24%
Answer: 24%
<span>4x•2-12x=7
Subtract 12x from 4x
-8x*2=7
Divide 2 on both sides
-8x=3.5
Divide both sides by -8
Final Answer: x= -0.4375</span>
One of them you pay automatically and the other you pay hands on