Answer:
23x + 9
Step-by-step explanation:
Perimeter = 2*(length + width)
= 2*( 5.5x + 10 + 6x - 5.5)
= 2* (5.5x + 6x + 10 - 5.5) {Combine like terms}
5.5x and 6 are like terms & 10 and (-5.5) are like terms
= 2* (11.5x + 4.5)
= 2*11.5x + 2*4.5
= 23x + 9
