Could someone help me understand? Having a hard time. :(

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

Sum of the interior angles of a pentagon

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