You are building a rectangular planter for your school garden. You want the area of the bottom to be 90ft^2. You want the length of the planter to be 3 ft longer than twice its width. What should the dimensions of the bottom of the planter be?

Question

anonymous · Answer

are there options?

anonymous · Answer

No, there are not answer choices :(

amorfide · Answer

you know that the area of a rectangle is  LW where L is length W is width

so
LW=90

you know the length is 3 ft longer than 2 x the width
so L=2W+3

you get an equation of two variables

LW=90
L=2W+3

substitute L into 
LW=90

to get

(2W+3)W=90

amorfide · Answer

work out W and L

anonymous · Answer

What do you mean by work out W and L?? @amorfide

amorfide · Answer

you have an equation of W
(2W+3)W=90

work out the value for W
then work out the value for L

and that is what the dimensions should be  L and W