Hello! Can anyone help me with this math problem? A rectangle has the area x^2 -81.
1. What is the length and width of the rectangle?
2. Set up an expression to show how to find the perimeter of the rectangle.
3. What is the perimeter of the rectangle?

34 cup. a serving of vegetable soup is 23 cup. the restaurant sold 20 servings of chicken noodle soup and 18 servings of vegetable soup. how many more cups of chicken noodle soup did they sell than cups of vegetable soup?

1. are the triangles similar and if so why? what is the value of x? show your work.

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.