Cos(a + b) + cos(a - b) = 2cosacosb

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x

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

What is the graph of the function fx x+2/x-3?