What is the expression and value of "six less than the quotient of a number and two increased by ten" when n= 8?

A. n/2-6+10; when n = 8, the value is 8.
B. 6-n/2 +10; when n = 8, the value is 12.
C. n/2-6+10; when n = 8, the value is 11.
D. 6-n/2+10; when n = 8, the value is 9.

With these 5 geometry questions! pls 1.)quadrilateral abcd is inscribed in this circle.what is the measure of ∠a ? enter your answer in the box.°2.)quadrilateral abcd is inscribed in a circle.what is the measure of angle a? enter your answer in the box.m∠a= 3.)quadrilateral abcd is inscribed in this circle.what is the measure of angle b? enter your answer in the box.m∠b= °4.)quadrilateral abcd is inscribed in this circle.what is the measure of angle a? enter your answer in the box.°5.) quadrilateral abcd is inscribed in this circle.what is the measure of angle c? enter your answer in the box.°