## Algebra: A Combined Approach (4th Edition)

Using Pythagorean Theorem, $20^{2}$ = $(x+8)^{2}$ + $x^{2}$ 2$x^{2}$ + 16x + 64 = 400 $x^{2}$ + 8x - 168 = 0 x = 9.56 (corr. to 3 sig fig) He saves 29.12 - 20 feet