Answer:
C x=17
Step-by-step explanation:
The top and bottom sides have to be equal for the quadrilateral to be a parallelogram
2x-9 = x+8
Subtract x from each side
2x-9-x = x+8-x
x-9 = 8
Add 9 to each side
x-9+9=8+9
x=17
➷ Opposite lengths in a parallelogram are equal
Therefore:
2x - 9 = x + 8
Add 9 to both sides:
2x = x + 17
Subtract x from both sides:
x = 17
Your answer is option c.
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