Answer:
-2f+10+11f
= 9f+10
Step-by-step explanation:
just expand it

Hope you could get an idea from here.
Doubt clarification - use comment section.
The expression to represent this would be (m-18)/k.
We first subtract the 18 beads she used in her mother's bracelet from her beginning number, m. We then divide our result by k, the number of bracelets she made for her friends.
You can use trigonometry and the tangent to get:
tan(11°)=150/x
so x=772 ft
Step-by-step explanation:
V = h × w × l
7650 = 9 × 25 × l
So,
l = 7650 ÷ 9 ÷ 25
l = 850 ÷ 25
l = 34
For the final, the length is 34.