What is the sum of the finite arithmetic series?
(-15)+0+15+30++195
a. 1,355
b. 1,350
c. 1,335
d. 1,000

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

What is the circumference of a circle with an area of 50.24 cm²?

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.°