20 points which expressions are equivalent to −7b(3−c)? select each correct answer. 21bc -4b + 7c -7b - 21bc -21bc + 7bc (-7b * 3) + (7b * c) which expressions are equivalent to this expression? 3(n - 4) select each correct answer. 3n + 12 2n - 12 + n -12 + n + n + n 3n - 4
Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?
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