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.

Apolygon is shown on the graph: a polygon is shown on the coordinate plane. vertices are located at 3 comma 5, 1 comma 3, 1 comma 1, 2 comma 0, 4 comma 0, 5 comma 1, and 5 comma 3. what effect will a translation 3 units down and 2 units left have on the polygon? be sure to address how it could impact the angles, side lengths, and congruency between the original pre-image and the image. xd i need