What is (1+x+1+1)/sqrt16=? in terms of x plez

What signals you that factoring by grouping is the best method to use when factoring a problem?

David must install fencing around a lot that is shaped like a right angle.the side of lot that runs east-west is 200 ft long.the side of the lot runs north-south is 125 ft long.calculate how many feet of fencing he will need to surround the entire lot.

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us