The perimeter of an equilateral triangle is 6n - 15. write an expression to represent the length of each side. plz

Which shows the pre image of triangle xyz

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4