Which method can be used to solve - 3-5 = 15? PLEASE HELP!

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

Rick is driving to his uncles house in greenville,which is 120 miles from ricks town .after covering x miles rick she's a sign stating that greensville is 20 miles away. which equation when solved will give the value of x. a: x+120 = 20 b: x x120 =20 c: x +20 equals 120 d: x x20= 120

21 a stick 7 inches long is broken into two pieces, so that one piece is twice as long as the other one. how long are the two pieces?