The line CD is the median of thre trapezoid, therefore its measures is shown below:
You must sum the largest base and the shortest base and divide both of them by 2, as following:
CD=(4.5+2.5)/2
CD=7/2
CD=3.5
Therefore, as you can see, the measure of the line CD is 3.5
The answer is: 3.5
All tapezoids have 1 parallel side
3u + 21 divide 3 by both sides and your answer would be u= 7 :)
I think the answer is 30, because if 134 +16 is 5 times the number of books Beezus reads, than just divide by 4 for the answer of 30