anonymous
  • anonymous
The height of a triangle is 5 m less than its base. The area of the triangle is 42 m2. Find the length of the base. A. 11 m B. 12 m C. 8 m D. 7 m
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
@pinkbubbles
aric200
  • aric200
Do you know the formula to solve the area of a triangle
anonymous
  • anonymous
hold on one sec

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anonymous
  • anonymous
@pinkbubbles is going to help me you guys should help some other people
anonymous
  • anonymous
guys its ok :D
aric200
  • aric200
Area = (1/2)* base*height
anonymous
  • anonymous
thank you @aric200
anonymous
  • anonymous
ok now we can get down to business
anonymous
  • anonymous
Area = (1/2)* base*height 42 = (1/2)*x*(x-5)
anonymous
  • anonymous
84 = x^2 - 5x
anonymous
  • anonymous
now we have to factorize, x^2 - 12x + 7x - 84 = 0 x(x-12) + 7(x-12) = 0 (x-12)*(x+7) = 0
anonymous
  • anonymous
so its D
anonymous
  • anonymous
no
anonymous
  • anonymous
12m
anonymous
  • anonymous
oh i was going to say 11 but yea your right

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