Hey i'm kinda i keep on getting 0.8 but i'm solving it on something ellse and getting -1 [12-[x+3]=10] btw that's the question

What is the answer to |-2x-5|-|-4+8| and x=7

In the diagram below, tan θ = sqrt 3. what is the value of m?

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.