Help plz!! Need by tomorrow!
Find the value of x in each case.

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

The length of a rectangular piece of land is 92 yards more than three times its width. the perimeter is 760 yards. find its dimensions.

Thanh and her crew are building a stage in the shape of a trapezoid for an upcoming festival. the lengths of the parallel sides of the trapezoid are 14 ft and 24 ft. the height of the trapezoid is 12 ft. what is the area of the stage? enter your answer in the box. ft²