In the diagram below, p is circumscribed about quadrilateral abcd.
find the value of x. show your work.

The value of x is 80° .

Step-by-step explanation:

As shown in the diagram.

The quadrilateral is inscribed in a circle.

Now using the property

Opposite angles in any quadrilateral inscribed in a circle are supplements of each other. (Their measures add up to 180 degrees.)

Thus

∠A + ∠C = 180°

As ∠A = 100° , ∠C = x

Put in the above

100° + x  = 180°

x = 180° - 100°

x = 80°

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step-by-step explanation:

x= cost per bracelet

number of bracelets * x + shipping charge = total cost

so

9x+9=72