Answer: |x − 39,800| < 1,300
The range of salaries is from $38,500 to $41,100.
Step-by-step explanation: i took the test
x is the middle line because it divides each catheter into two equal parts.
==> x is half the hypotenuse.

Opposite of 90* would be equivalent to the square root of the other sides
(x-3)² ⇒ (x-3)(x-3)
(x-3)(x-3) = x(x-3) -3(x-3) ⇒ x² - 3x - 3x + 9 ⇒ x² - 6x + 9
The 3rd option is the correct answer. x² - 6x + 9