On October 16, the Moore family received 23 pieces of mail, consisting of ads, magazines, bills, and letters. If they received three more magazines than bills, five more letters than magazines, and the same number of ads as bills, how many ads did they receive?
Answer
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You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero. 

True will be your answer dude

How are period and frequency related to each other? dperiod is the reciprocal of frequency.