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Mathematics 18 Online
OpenStudy (anonymous):

If f(x) varies directly with x and f(x) = 40 when x = 8, find he value of f(x) when x = 2 a.2 b.5 c.10 d.15

OpenStudy (hockeychick23):

ok so if f(x)=40 when x= 8, 8 is 1/5 of f(x) so you have to multiply x(5) to solve this , so it's 2(5)

OpenStudy (perl):

it is easier to replace f(x) with y y varies with x means y = k*x

OpenStudy (anonymous):

ok Thanks guys!

OpenStudy (hockeychick23):

no problem!(:

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