What is ? 3x+6=3(x+?)

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Find the domain and range of the following function f(x) = 51x - 21+ 4

The perimeter of a rectangular lot of land is 436 ft. this includes an easement of x feet of uniform width inside the lot on which no building can be done. if the buildable area is 122 ft by 60 ft, determine the width of the easement. select one: a. 9 feet b. 18 feet c. 4.5 feet d. 7 feet