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8.) c

9.) d

10.) d

Step-by-step explanation:

8.) These are same side interior angles so they have a different measures that equal up to 180.

75 + 4x - 9 = 180 (collect like terms)

4x + 66 = 180 (subtract 66 on both sides)

4x = 114 (divide by 4 on both sides)

x = 28.5

9.) 8x -14 and 5x + 34 are alternate exterior angles so the equal the same measure.

8x - 14 = 5x + 34 (add 14 on both sides)

8x = 5x + 48 (subtract 5x on both sides)

3x = 48 (divide by 3 on both sides)

x = 16 NOW PLUG IN TO 8x - 14 to find y

8(16) - 14 + 5y + 16 = 180 (distribute and collect like terms)

130 + 5y = 180 (subtract 130 on both sides)

5y = 50 (divide by 5 on both sides)

y = 10

10.) They have the same measure they are alternate exterior angles

16x + 22 = 134 (subtract 22 on both sides)

16x = 112 (divide by 16 on both sides)

x = 7

Hope this helps ya!!

-1, -2, -3, -4, -6

step-by-step explanation:

step-by-step explanation:

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