Which shows the equation below written in standard form? 13 - 6x = (2x - 5)2 + 3
a. 4x2 - 14x - 15 = 0
b. 4x2 - 14x + 15 = 0
c. 4x2 - 26x + 15 = 0
d. 4x2 - 26x - 15 = 0

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.°