PLS HELP DUE TODAY find the geometric mean between each pair of numbers. include steps and answer as whole number or radical form.

1.) 4 and 4
2.) 4 and 6
3.) 6 and 9
4.) 12 and 20
5.) 4 and 25

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