I need help! Will give high amount of points, 5 stars and brainiest if you help me get it right. Must explain how you got your answer I have to show my work (thanks).

9. Supplementary (angles adds to 180)

10. complementary (angles add to 90)

11.

 6x+4=10x

   /6x

   4=4x

    x=1

12.

 8+7

   90/15

   x=6

9. Supplementary Angle

10. Complementary Angle

11. Supplementary Angle

12. Complementary Angle

Step-by-step explanation:

I don't know how to solve the xs, but Supplementary angles means two angles that add to equal 180 degrees. And Complementary angles means two angles that add to equal 90 degrees.

check out this website

you will enjoy it as it give interesting things to look up or do!

3x + 18 = 147°

step-by-step explanation:

3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.

i hope i you.