Is angle 4 and angle 7 vertical angles? i think that they aren’t but i’m not quite sure..

Angle 4 and Angle 7 are vertical angles.

Step-by-step explanation:

This is because both angles that have he same straight lines..

Sorry for the bad explanation :'(

Yes

Step-by-step explanation:

∠4 = ∠7 ( vertical angles )

The angles are opposite angles of the vertex with the same straight lines

b. 10=9.1+0.2x

step-by-step explanation:

that's it

answer: a.   one is a factor of every whole number since every number is divisible by itself.