✩Answer:
[tex]y=54.5x[/tex]
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[tex]x=3, y=163.5[/tex]
[tex]Checking :\\[/tex]
[tex]y=53x[/tex]
[tex]=53(3)=159[/tex] ✘
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[tex]y=53,5x[/tex]
[tex]=53.5(3)=160.5[/tex] ✘
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[tex]y=54x[/tex]
[tex]=54.5(3)=162[/tex] ✘
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[tex]y=54.5x[/tex]
[tex]54.5(3)=163.5[/tex] ✓
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[tex]So,B~ is~ your~ answer[/tex]
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hope it helps...
have a great day!!
