I believe that the correct answer is A
Answer:
8. 
9. -38 ÷ 19
10. -4 ÷ -2
11. 190° im pretty sure
Step-by-step explanation:
If three points were A, B and C are collinear points and B is between A and C, then AB+BC=AC
Step-by-step explanation:

Answer:
8X2-38X-380
Step-by-step explanation:
(2x+10)(4x-38)
Expand the brackets.
2X(4X-38)+10(4X-38)
Multiple the inner ones by the outer ones
(2X)(4X)-(38)(2X)+(10)(4X)-(10)(38)
=> 8X2-78X+40X-380
8X2-38X-380