anonymous
  • anonymous
A ladder is resting against a wall. The ladder and the ground make an angle of 45° and the ladder is 7 ft from the wall. How long is the ladder?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
Just move all values to one side and leave the other side to zero and there's your quadratic formula. Let x be the distance from the wall to the bottom of the ladder Let 2x+1 be the length of the ladder 15^2 + x^2 = (2x+1)^2 4x^2 + 4x + 1 = 15^2 + x^2 I just expanded and switched the sides 3x^2 + 4x - 224 = 0 x^2 + 4x - 672 = 0 <-- bridge method is not in the NYC curriculum but I don't know about yours (x+28)(x-24) = 0 (3x+28)(3x-24) = 0 (3x+28)(x-8) = 0 x = 8
anonymous
  • anonymous
8.76 FT?

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