SOLUTION: If perimeter of rectangle is 40.And the width is 8, what is the lenth?

Question 26017: If perimeter of rectangle is 40.And the width is 8, what is the lenth?
Answer by mathrebel(25) (Show Source): You can put this solution on YOUR website!
Simple: the formula for perimeter of a rectangle is 2*(a+b), where a and b are the sides:
side b=8
side a=?
40=2*(a+8) divide by two both sides and get:
20=a+8 subtract 8 from both sides and:
a=12 whoala!!!
now plug it in back to check the answer:
is 40=2*(12+8)??
40=2*20
40=40 you betcha!!!!
good luck
RELATED QUESTIONS
the perimeter of a rectangle is 65 inches. The ratio of the lenth to the width is 4:1.... (answered by mananth)

A rectangle has a perimeter of 60 inches and lenth of 22 inches. What is the width of the (answered by checkley77)

What is the dimensions of a rectangle Lenth and width if the length is two more than five (answered by pphantom)

The Lenth of a rectangle is 4 more than the width. The area of the rectangle is 1 more... (answered by advanced_Learner,Alan3354)

The Perimeter of a rectangle is 46 ft. The width is 3ft less than twice the lenth. Find... (answered by mralgebra)

The perimeter of a rectangle equals the sum of the lengths of its four sides. If the... (answered by unlockmath)

the perimeter of a rectangle is 36. if the lenth is twice the width, find the length,... (answered by Maths68)

If the perimeter is 104cm and the lenth is 28cm what is the width (answered by ewatrrr)

The length of a rectangle is one half its lenth. The perimeter of the rectangle is 54cm.... (answered by checkley77)