Ms. cubaj uses a piece of rope that is 40 meters long to make a rectangular garden. the perimeter of the rectangle must be 40. write a function that represents the area of the rectangle with the length l.

A function that represent the area of rectangle with length is                 20 l - l²  .

Step-by-step explanation:

The total length of rope = L =40 meters

The perimeter of rectangular garden which can be made using rope = p = 40 meters

Let the width of rectangular garden = w meters

And The length of rectangular garden = l meters

Now,

The perimeter of rectangular garden = 2 × Length + 2 × width

I.e p = 2 × l + 2 × w

Or, 40 meters = 2 × l + 2 × w

I.e l + w =

∴ l + w = 20

Or, w = 20 - l

Now, Again

Let The area of rectangular garden = A = Length × width

Or, A = l × w

Or, A =  l × (20 - l)

∴ A = 20 l - l²

So, Area of rectangular garden = A = 20 l - l²

Hence, A function that represent the area of rectangle with length is                 20 l - l²  . Answer

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

ou would have 12 of each