An investor has an account with stock from two different companies. Last year, his stock in Company A was worth $6100 and his stock in Company B was worth $6480. The stock in Company A has decreased 2% since last year and the stock in Company B has decreased 10%. What was the total percentage decrease in the investor's stock account? Round your answer to the nearest tenth (if necessary).
21 i watched a 3 hr vid explaining it
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answer: option a.
you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.
then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.
you can observe in the figure that the angles ∠opq and the angle ∠orq are opposite, therefore:
then, can be used to d to calculate the measure of ∠opq