I needed some help on these, thank you :)

1) Solve: (2x+ 1) (x-2)- -3 2) A sign is to have the shape of a triangle with a height 3 it greater than the length of the base How long should the base be if the area is to be 14 ft? (Must use equation to solve or no credit will be given) 3) Give the domain using set-builder notation and interval notation. ((x) 4x+ 3 4) Simplify: 2 x-+llx + 30 + x+6 x+5 5) Solve; 4x +3 3 2 x +1 1x+30 x+6 x+S