Which expression is equivalent to 5.4+3.4w-1.8w +5.8 a) 7(1.6+w) b) 1.6(7+w) c) 1.6(7w) d) 1.6(0.25+w)

Do 5.4 plus 5.8 then do 3.4w minus 1.8w and whatever you get for each is your key to the expression. So if you were to solve the answers like A you would do 7(1.6+w) and see what you would get. Obviously A isn't the answer. Sorry, this is hard to explain. But the answer is C 

We need to see the diagram