(x+1)-(-2x-5)
=x+1+2x+5
=3x+6
=3(x+2)
1. in picture 1
2. in picture 2
Hope this helps :T
Also I am not so shure about 2, but I am 98% shure 1 is right.
Option C. It’s where it’s decreasing over the entire interval.
B=5 because
8-2b=-2
-8 -8
-----------
-2b=-10
-----------
-2 -2
b=5
5(-2)=-10