Question

Tell whether the angles are adjacent or vertical. Then find the value of x
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Answer 1

Explanation:

8.Solution:

x+35=90(adjacent)

x=90-35

x=55

9.Solution:

x=128(vertical)

10.Solution:

x+117=180(adjacent)

x=180-117

x=63

11.Solution:

75=4x-25(vertical)

75+25=4x

100/4=x

x=25

12.Solution:

4x+2x=90(adjacent)

6x=90

x=90/6

x=15

13.Solution:

7x+x+20=180(adjacent)

8x=180-20

x=170/8

x=21.25