Distance between (-7,-6) and (-2,-16)

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?

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x

Which equation can be solved to find x the measure of jk in the apex