The function f(x) = -5x² + 17x + 21 models the predicted sales of a pen after x price increases. a) Use the function to complete the Predicted Sales column. The x-values are in the first column.

b) Calculate the residuals. Explain how you found at least one of the answers.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Consider the following estimates from the early 2010s of shares of income to each group. country poorest 40% next 30% richest 30% bolivia 10 25 65 chile 10 20 70 uruguay 20 30 50 1.) using the 4-point curved line drawing tool, plot the lorenz curve for bolivia. properly label your curve. 2.) using the 4-point curved line drawing tool, plot the lorenz curve for uruguay. properly label your curve.

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters