Question

Help pleaseeee i don’t understand

Answer 1

Perimeter formula of a rectangle:

`perimeter = 2(length + width)`

perimeter » 26 cm

width » 4 cm

let the length be l :

`26 = 2(l + 4)`

divide all sides by 2:

`(26)/(2) = (2(l + 4))/(2) \\ \\ 13 = l + 4`

subtract 4 from either sides:

`13 - 4 = (l + 4) - 4 \\ 9 = l \\ \\ { \boxed{ \boxed{length = 9 \: \: centimeters}}}`