Simplify and express the answer as a decimal. (−3+6) 2 ÷4.5

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Azul has 4 green picks and no orange picks.you add orange picks so that there are 2 orange picks for every 1 green pick.how many picks are there now.

If you were constructing a triangular frame, and you had wood in the length of 4 inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood?