Can anyone explain step by step how to solve a general 30 60 90 special triangle?

Chose the graph below that represents the following system of inequality’s

5(-9w) put expression in distributive property

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