What is the difference of 15 and 7?
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3
sondrit
not

Twelve less than a number is at most 20

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?

Fast! find the length of cu. the triangles are similar. show your work.