If the distance between A(10,8) and B (a,2) is 10 find a.

Fiona races bmx around a circular dirt course. if the radius of the course is 70 meters, what is the total distance fiona covers in two laps of the race? a. about 30,772 meters b. about 15,386 meters c. about 879.2 meters d. about 439.6 meters e. about 219.8 meters23 points hurry

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

What is the difference between the equations of a vertical and a horizontal line?