Answer:
6. Actual length is 8 mm.
7. 13
8. 4
9. x=12
10. y=4
11. a=-3
12. y=-5
Step-by-step explanation:
$10 because 2 and 3 add together and subtract 15 equals 10
Answer:
See the explanation below.
Step-by-step explanation:

Starting from 
By putting
we have:

Democracy: a system of government by the whole population or eligible members of state, typically through elected representatives
elements:
- equality
- accountability
- rule of law
- transparency
If it is a slope formula I believe it is y= 4x-24