Precalc)
Could someone please show me the work to this question on limits? I know the answer is 7, just am lost on how to get there. Thank you people!

We have enough material to build a fence around a station that has a perimeter of 180 feet the width of the rectangular space must be 3 1/4 feet what must the length be

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

(x-5)1/2+5=2 what is a possible solution?