Answer:
396
Step-by-step explanation:
circumference of a circle is 2 x pi x r = 2 x 63 x (22/7) = 396
So to solve for x, you'll need to combine all the angles and equal it to 720, and from there we can solve.
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Combine like terms to get
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Subtract 470 on each side to get
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Then just divide on each side and you'll get

To find the value of the (x+10) angle, just substitute 125 for x and solve.
Answer:
5
Step-by-step explanation:
0.5x=6-3.5
0.5x=2.5
x=2.5÷0.5
x=5
Answer is a Decimal: x=-0.4