How could you rewrite the expression (–3 + 5) + 8 + (–1) using the Associative Property of Addition? PLEASE HELP OMGGG

If the value of cos330°is√3/2 then find cos 165°.

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.°

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.