What is 10% of 82. plz help I don't know what it is​

Which statement explains how you could use coordinate geometry to prove that quadrilateral abcd is a parallelogram? -5 -4 -3 -2 -1 t 1 2 3 4 prove that all sides are congruent and have slopes that are opposite reciprocals prove that segments ad and ab are congruent and parallel prove that opposite sides are congruent and have equal slopes prove that segments bc and cd are congruent and parallel

Acircle has a circumference of 7.850 units. what is its radius?

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n