A rectangle is four times longer than it is wide. It has an area of 16 square meters. What are the dimensions of the rectangle?

The width = 2 and the length = 8

Step-by-step explanation:

Let the width be x

The the length will be 4x

Area = 16

Area = l × w

16 = 4x × x

16 = 4x²

Divide both sides by 4

16/4 = x²

x² = 4

x = √4

x = 2

Therefore the width = 2 and the length = 8

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!