Maths.. ratios/ and pi/ and maybe a little expansion?

  • Thread starter Thread starter bellarose
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bellarose

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Can anyone answer any of these 3 and tell me how they got them?
I'm a little bit confused.

Express the ration 24:148 in simplest form.

Calculate the value of 4 X (pi) X r³
¯3
if pi= 3.14 and r=3

AND
Expand and simply:
-2(m-9) - (3m-4)
 
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