Answer:
1/2x
Step-by-step explanation:

To solve this type of fraction you need to times the inverse of the bottom fractal, both over and under. In this case the inverse of 1/2 is 2/1
Answer:
100°= angle b(VERTICAL OPPOSITE ANGLE)
100°+x°=180°[co interior angle]
x=180°-100°
x=80°
The answer should be (7x+1)(7x-1)
Correct answer is B
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Reflection, across the y axis