Please help, solve for x. Due today and all I’ve gotten are links :(

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

Asquare picture with sides of 32 inches is to be mounted on a square mat with sides of 52 inches. find the area of the mat that will remain uncovered by the picture.

Drag the tiles to the correct boxes to complete the pairs. label each function. as even , odd, or neither.