Direct proportional

If m is proportional to n and m=5 when n=4, then what is the value of m when n=18?

Correct answer:

m2 =  22.5

Step-by-step explanation:

m=5 n=4  n2=18  r = m:n = m2:n2  r=m/n=5/4=45=141=1.25  m2=n2 r=18 1.25=22.5



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