Lily is using dark power crystal to raise an army of zombies. Each crystal can raise 9 zombies. How many crystals does Lily need to 6,174 zombies?

Respuesta :

Answer:

686 crystals

Step-by-step explanation:

We can use ratios to solve

1 crystal         x crystals

---------------- = -------------

9 zombies      6174 zombies

Using cross products

9x = 6174

Divide each side by 9

x = 6174/9

x =686