Which of the following types of numbers is not a subset of real numbers? select all that apply. rational numbers even numbers irrational numbers imaginary numbers

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Two numbers have a sum of -19. one number is x. what expression represents the other number?

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.°