Answer:

Step-by-step explanation:
Combine Similar Elements: 

Combine Similar Elements: 

Subtract 14 From Both Sides

Simplify

Add
To Both Sides

Simplify

Divide Both Sides By 

Simplify

Answer:
BC= 23.0km (nearest tenth)
Step-by-step explanation:
Please see the attached picture for full solution.
Answer:
C $1.75
Step-by-step explanation:
$469 divided by 268 is $1.75, so it's $1.75 per item
D) construction of the angle bisector.
So if you have a triangle that is not equilateral the perpendicular bisectors would not work so you need angle bisectors.
I have drawn a diagram
The green is the angle bisectors and the yellow the perpendicular bisectors.
You can see the problem straight away