Having problems with this, please help.
And don’t know where to start.

Answer:
Use the pythagorean theorem to solve the equations. If you aren't solving for c, manipulate the equation to solve for whichever side you are solving for.
Answer:
1. 8m
2. 18ft
3. 11 1/2ft
4. 315m
5. 38ft
6. 2054ft
Step-by-step explanation:
1. 6 - 5 = 1
1 + 7 = 8m
2. 15 - 8 = 7
7 + 11 = 18ft
3. 5 1/2 - 4 = 1 1/2
1 1/2 + 10 = 11 1/2ft
4. 75 - 60 = 15
15 + 300 = 315m
5. 30 - 6 = 24
24 + 14 = 38ft
6. 1000 - 400 = 600
600 + 1454 = 2054ft