HELP ME

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.

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?