There are 1,620 minutes of music to be put on 9 CD's. If the same number of minutes fits on each CD, how many minutes of music fit on each CD?

Areflection of shape i across the y-axis, followed by a , and then a translation left 6 units and down 4 units confirms congruence between shape i and shape ii. alternatively, a of shape ii about the origin, followed by a reflection across the y-axis, and then a translation right 4 units and up 6 units confirms congruence between shape ii and shape i.