What is the number one rule of adjusting properties when using the sales comparison approach to value?

Enter the number of complex zeros for the polynomial function in the box. f(x) = x+ + 5x² +6

The chs baseball team was on the field and the batter popped the ball up. the equation b(t)=80t-16•16+3.5 represents the height of the ball above the ground in feet as a function of time in seconds. how long will the catcher have to get in position to catch the ball before it hits the ground? round to the nearest second

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"