Can you give a rule for determining the perimeter of a polygon when the dimensions are doubled? What about when the dimensions are tripled?​

How do i do this using elimination 2x+3y=12 x-y=6

Your friend swims on the school team. in his first four races, his times are 24.7, 23.5, 25.6, and 27.2 seconds. which time listed for his next race would make the range larger?

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)