SOLUTION: i) Find the perimeter of a rectangle with a length of 5x and width of x ( write an algebraic expression ) ii) if the perimeter was 30m, what was the value of x?

Algebra ->  Expressions-with-variables -> SOLUTION: i) Find the perimeter of a rectangle with a length of 5x and width of x ( write an algebraic expression ) ii) if the perimeter was 30m, what was the value of x?      Log On


   



Question 748945: i) Find the perimeter of a rectangle with a length of 5x and width of x ( write an algebraic expression )
ii) if the perimeter was 30m, what was the value of x?

Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
i)Perimeter = 2 x length + 2 x width
= 2 x (5x) + 2 x (x)
= 10x + 2x
ii) 10x + 2x = 30 m
12x = 30m
x = 2.5 m