Answer:
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Option B is the correct option.
Step-by-step explanation:

Move constant to R.H.S and change its sign:

Take the L.C.M


Calculate

Hope this helps...
Good luck on your assignment..
X represents the number that would be added to the silver cars.
x/40= 4
X=40x4
x=160
Subtract the given 20 from 160 because 160 is the total number
160-20=140
Therefore 140 would be added to 20 silver cars to get the ratio1:4
Answer:
V = 82,406.16 cm³
Step-by-step explanation:
Volume of a sphere
V = 4πr³/3
V = 4•3.14•27³/3
V = 247,218.48/3
V = 82,406.16 cm³
See Quadratic Formula and Determinant's/Delta's formula