What is the value of the rational expression 6-x/x+5 when x=2

Ngrid mixes 3.6 pounds of almonds with some raisins to make a trail mix. she divides the trail mix into 12 equal portions. each portion weighs 0.7 pound. how many pounds of raisins did she use to make the trail mix? express the answer to the nearest tenth.

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Asap! i'm not good math and i'm lost.