In ΔXYZ, the measure of ∠Z=90°, ZY = 36, XZ = 77, and YX = 85. What ratio represents the cotangent of ∠Y?

Which fraction below is equivalent to 10/12?

[15 points]find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible

Math it's appreciated. (picture provided)