Which property is demonstrated by the following statement? 13 + (27 + g) = (13 + 27) + 6 Please help me I am being timed!!!

Roger and natalie travel in similar cars. roger's car drives the two miles to school in 7.5 minutes. natalie drives the same distance in the opposite direction but in only 6.5 minutes. what is true of their velocities?

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.