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alex41 [277]
3 years ago
7

Please help me i dont get either one of them i just need one of them. Please shiw steps. Thanks

Mathematics
1 answer:
pychu [463]3 years ago
5 0

NO.4:X=38

NO.5:X=41

NO.6:X=24

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25 sheets of plywood will be needed

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Each sheet of plywood measures 4ft*8ft=32ft^{2}.

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Surface _{to cover} = Surface _{house} -Surface _{hole}= (28ft*30ft)-(12ft*4ft)= 840ft^{2}-48ft^{2}=792ft^{2}

To know how many sheets will be needed, we divide the surface to be covered by the surface of each sheet

Sheets_{needed} =\frac{Surface _{house}}{Surface _{sheet}} =\frac{792ft^{2}}{32\frac{ft^{2}}{sheet} } = 24,75 sheets

As we can't buy 0,75 of a sheet, we round it up, i.e. we will need 25 sheets of plywood for subflooring.

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