Point d is the image of d(-2,1) under a reflection across the x-axis. what are the coordinates of d?

(-2,-1)

Step-by-step explanation:

To reflect something across an axis we need to change the coordinate of the other axis.  To reflect a point across the X axis we need to change the sign on  the Y axis because that will put it on the other side of the X axis.  In this question the 1 is what we will change from positive to negative.  By doing this it will move the point from above the X axis to below the X axis.

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78.59 is the mean

step-by-step explanation:

d) 48

step-by-step explanation:

16,32,48,64,80,96,112,128,144,160,176,192,208,224,240,256,272,288,304,320,336