The depth, d , in inches of the water in a tidal pool, is modeled by the function d=−2x2+12x+7, where x is the number of hours since noon.

1. 3/6 or 1/22. 1/123. 1/84. 1/105. 2/12 or 1/6

Remember, you can do anything to an equation as long as you do it to both sidesminus 36 from both sides4.5(8-x)=66-2.5(3x+24)distribute36-4.5x=66-7.5x-60add like terms36-4.5x=-7.5x+6add 7.5x to both sides36+3x=6minus 36 from both sides3x=-30divide both sides by 3x=-10

The distance between the first bird and the bird watcher is 30 feet, hope this . : )

The third one i'm pretty sure