Which equation has the same solution as x^2-6x-12=0

a) (x+3)^2=21. b) (x-3)^2=21. c) (x+3)^2=3. d) (x-3)^2=3.

Asap! will mark brainliest! ( respond asap, it's urgent! : )) what is the slope for equation y =-3x + 8

Which answer choice is it? is it the first ,second,third or fourth giving 40 points for whoever answers correctly you

Akayaker travels 3 miles upstream and 3 miles downstream in a total of 4 hours. in still water, the kayaker travels at a speed of 2 mph. what is the average speed of the river's current?