anonymous
  • anonymous
A rectangle has width of 4 feet. Find a function that models it's area A in terms of Its perimeter P.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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campbell_st
  • campbell_st
Start with what you know about the perimeter P = 2(4) + 2l or P = 2l + 8 so make l the subject. now for Area Area = l * w you know w = 4 so using what you know Area = 4l now substitute the value of l from the perimeter for the final answer
anonymous
  • anonymous
Where do I plug that in ?
campbell_st
  • campbell_st
\[Area =4 \times l\] and the perimeter is \[P = 8 + 2l\] can you make l the subject... in the perimeter equation

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anonymous
  • anonymous
The answer is suppose to be A(P) = 2P-16 ??
campbell_st
  • campbell_st
yep... we'll get to that... in the perimeter equation above can you make length (l) the subject...

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