Help please someone i’ll give brainliest and this is for a quiz

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.

What is the value of x in this triangle? a. 53° b. 62° c. 65° d. 118°