14 because they are vertical angles
Let the number be x
The sum of 2 equal numbers is simply x+x or 2x.
The answer is a. here’s a picture that hopefully helps explain the reasoning/work
Distributive property is
a(b+c)=ab+ac so
first, distribute
remember than (-) times (-)=(+)
-5(3x-8)=(-5)(3x)+(-5)(-8)=-15x+(+40)=-15x+40
so it is -15x+40=-45
the answe ris B