Answer:
circumference of circle = 2×pi×r
circumference of circle = 2×3.14×12.7
circumference of circle = 79.756 in
[ Answer ]

[ Explanation ]
- Formula For Area Of Trapezoid:

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A = 10
B = 18
H = 6
- Plug Numbers Into Equation:

10 + 18 = 28
28 ÷ 2 = 14
14 · 6 = 84
84
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Answer:
since alternate exterior angles are congruent, you get:
6x + 5 = 7x - 4
subtract 6x from both sides of this equation and add 4 to both sides of this equation to get 5 + 4 = 7x - 6x which results in 9 = x
solve for x to get x = 9 degrees.
Step-by-step explanation: