Can you please add the picture with the problem, then I will answer your question ?
Answer:
-9w+12wx+3wy
Step-by-step explanation:
just distribute 3w through the parentheses
ANSWER

EXPLANATION
The given function is,

The parent function of this ceiling function is

When this function is shifted horizontally 3 units to the left, we obtain the transformed function,

The correct answer is option D.
See attachment.
The wood is 10 inches and you're cutting it into 1/2 pieces, so divide 10 by 1/2, which is 20, The carpenter can cut 20 dowels.