First rewrite it like this 1. y=5/4x Then, make X the subject 2.4x=5/y x=(5/y)÷4 3. Once done, simply replace x with h(x)^-1 and y with x h(x)^-1= (5/x)÷4 Sorry I'm not very good at rearranging formula but hope this helps :)
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7 centimeters because you have to find how many kilometers are in each kilometer and that is 40 so then you divide 286 by 49 which is 7.15 then you round