anonymous
  • anonymous
Please help me with this question!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
|dw:1443649213389:dw|
anonymous
  • anonymous
whats the area
anonymous
  • anonymous
\[x ^{2}+3x-40 ft\]

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anonymous
  • anonymous
ft ^2
Owlcoffee
  • Owlcoffee
The area of any triangle is calculated by: \[A _{\triangle}=\frac{ b.h }{ 2 }\] This means, base time height divided by two. Since in the excercise we are given the area \(x^2+3x-40\) and we know that the base is \(x+8\), we can then use the formula above by replacing the data: \[x^2+3x-40=\frac{ (x+8)(h) }{ 2 }\] Now, it's just a matter to solve for "h".
anonymous
  • anonymous
So, \[(x-5)(x+8)=\frac{ (x+8)(h) }{ 2 }\] Now, what do i do.
Owlcoffee
  • Owlcoffee
Well, now try to isolate that h on any side of the "=" sign.
anonymous
  • anonymous
does the (x+8) cancel out?
anonymous
  • anonymous
@owlcoffee

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