clara56
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I have a math problem it says: He used 160 batteries in 40 calculators. how many batteries are required for 225 calculators? Can I have a little help please?

I have a math problem it says He used 160 batteries in 40 calculators how many batteries are required for 225 calculators Can I have a little help please class=

Respuesta :

erika18marie
You can set up an equality:

40/160 = 225/x

Cross multiply:

40x = 160(225)

Evaluate: 

40x = 36000

Isolate x:

x = 900.

So, 900 batteries are required for 225 calculators. 

Hope this helped!! xx

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