The Area of a rectangle is 3x2 + 9x square inches

. The length of the rectangle is 3x inches.

What is the width of the rectangle?

1. Explain how you find the area of a rectangle.

2. Explain how you find the width of a rectangle given the Area and the length.

3. Show you work and solve for the width of this rectangle.

Width of rectangle = inches

Step-by-step explanation:

Given Data:  

Length of rectangle = L =   inches ------>(Equation 1)

Area of rectangle = A =   square inches------>(Equation 2)

To find out:  

Width of rectangle = W = ?  

Formula:  

Area = A = L×W

Width of rectangle =

Solution:  

Width of rectangle =

Width of rectangle =

Width of rectangle =

Width of rectangle = inches

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:

(3x-8) or (3x+8)

step-by-step explanation: