Answer:
4
Step-by-step explanation:
H (height the 2x4 contact the fence)
sin 30° = H / 8
1 /2 = H / 8
H = 1/2 * 8 = 4
17. The answer should be 17
17 + 5shirts = 42
5shirts = 42-17 = 25
1shirt = 25/5 = 5
A shirt costs £5.
3*5 + 1hat = 17
15 + 1hat = 17
1hat = 2
A hat costs £2
Step-by-step explanation:
You can set up a proportion.
Let x be the number of pencils needed.

Solve for x.
x = 9444.44 pencils (round it up to 9445 pencils if you need a whole number)
1 because negative 4 plus 5