She has to go down 4, back up to 0, and then up another 4, then back to 0.I<span>f positive 1 represents the first level above ground, negative numbers are a good choice to represent levels below ground. 8 flights; starting at -4 and moving to 4.</span>
11 feet = 132 inches The boards are x, x and (x-3) inches long. x + x + x -3 = 132 3x = 135 x = 45 The boards are 45 inches, 45 inches and 42 inches long.
