Anna is going to play guitar in her school's annual concert. if she starts by practicing for one hour per day and increases the time by 30 minutes each day, how long will she practice on the seventh day?

true? is that what you're asking or do you mean something else?

answer: option a.

step-by-step explanation:

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